diff --git a/images/4.2/alpine/entrypoint.sh b/images/4.2/alpine/entrypoint.sh
index cb8d5dd..2e7b544 100755
--- a/images/4.2/alpine/entrypoint.sh
+++ b/images/4.2/alpine/entrypoint.sh
@@ -23,13 +23,13 @@ fi
 #########################################
 
 # Automatically replace "TAIGA_HOSTNAME" with the environment variable
-sed -i "s|TAIGA_HOSTNAME|$TAIGA_HOSTNAME|g" /taiga/conf.json
+sed -i "s|TAIGA_HOSTNAME|${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}|g" /taiga/conf.json
 
 # Look to see if we should set the "eventsUrl"
-if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
   log "Enabling Taiga Events"
   sed -i \
-    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://$TAIGA_HOSTNAME/events\",|g" \
+    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}/events\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Events"
@@ -39,13 +39,13 @@ else
 fi
 
 # Handle enabling/disabling SSL
-if [ "$TAIGA_SSL_BY_REVERSE_PROXY" = "True" ]; then
+if [ "${TAIGA_SSL_BY_REVERSE_PROXY}" = "True" ]; then
   log "Enabling external SSL support! SSL handling must be done by a reverse proxy or a similar system"
   sed -i \
     -e "s|http://|https://|g" \
     -e "s|ws://|wss://|g" \
     /taiga/conf.json
-elif [ "$TAIGA_SSL" = "True" ]; then
+elif [ "${TAIGA_SSL}" = "True" ]; then
   log "Enabling SSL support!"
   sed -i \
     -e "s|http://|https://|g" \
@@ -59,31 +59,31 @@ elif grep -q "wss://" "/taiga/conf.json"; then
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG" ]; then
-  log "Updating Taiga Front debug status: $TAIGA_DEBUG"
+if [ -n "${TAIGA_DEBUG}" ]; then
+  log "Updating Taiga Front debug status: ${TAIGA_DEBUG}"
   sed -i \
-    -e "s|\"debug\": .*,|\"debug\": $TAIGA_DEBUG,|g" \
+    -e "s|\"debug\": .*,|\"debug\": ${TAIGA_DEBUG},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG_INFO" ]; then
-  log "Updating Taiga Front debug info status: $TAIGA_DEBUG_INFO"
+if [ -n "${TAIGA_DEBUG_INFO}" ]; then
+  log "Updating Taiga Front debug info status: ${TAIGA_DEBUG_INFO}"
   sed -i \
-    -e "s|\"debugInfo\": .*,|\"debugInfo\": $TAIGA_DEBUG_INFO,|g" \
+    -e "s|\"debugInfo\": .*,|\"debugInfo\": ${TAIGA_DEBUG_INFO},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_LANGUAGE" ]; then
-  log "Updating Taiga Front default language: $TAIGA_DEFAULT_LANGUAGE"
+if [ -n "${TAIGA_DEFAULT_LANGUAGE}" ]; then
+  log "Updating Taiga Front default language: ${TAIGA_DEFAULT_LANGUAGE}"
   sed -i \
-    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"$TAIGA_DEFAULT_LANGUAGE\"|g" \
+    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"${TAIGA_DEFAULT_LANGUAGE}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_THEMES" ]; then
-  log "Updating Taiga Front themes list: $TAIGA_THEMES"
+if [ -n "${TAIGA_THEMES}" ]; then
+  log "Updating Taiga Front themes list: ${TAIGA_THEMES}"
   themes_list=
-  for theme in $TAIGA_THEMES ; do
+  for theme in ${TAIGA_THEMES} ; do
     themes_list="$themes_list\"$theme\", ";
   done
   sed -i \
@@ -96,31 +96,31 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_THEME" ]; then
-  log "Updating Taiga Front default theme: $TAIGA_DEFAULT_THEME"
+if [ -n "${TAIGA_DEFAULT_THEME}" ]; then
+  log "Updating Taiga Front default theme: ${TAIGA_DEFAULT_THEME}"
   sed -i \
-    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"$TAIGA_DEFAULT_THEME\"|g" \
+    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"${TAIGA_DEFAULT_THEME}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PUBLIC_REGISTER_ENABLED" ]; then
-  log "Updating Taiga Front public registration status: $TAIGA_PUBLIC_REGISTER_ENABLED"
+if [ -n "${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}" ]; then
+  log "Updating Taiga Front public registration status: ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}"
   sed -i \
-    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": $TAIGA_PUBLIC_REGISTER_ENABLED,|g" \
+    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_FEEDBACK_ENABLED" ]; then
-  log "Updating Taiga Front feedback status: $TAIGA_FEEDBACK_ENABLED"
+if [ -n "${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}" ]; then
+  log "Updating Taiga Front feedback status: ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}"
   sed -i \
-    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": $TAIGA_FEEDBACK_ENABLED,|g" \
+    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_SUPPORT_URL" ]; then
-  log "Updating Taiga Front support URL: $TAIGA_SUPPORT_URL"
+if [ -n "${TAIGA_SUPPORT_URL}" ]; then
+  log "Updating Taiga Front support URL: ${TAIGA_SUPPORT_URL}"
   sed -i \
-    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"$TAIGA_SUPPORT_URL\",|g" \
+    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"${TAIGA_SUPPORT_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front support URL"
@@ -129,10 +129,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PRIVACY_POLICY_URL" ]; then
-  log "Updating Taiga Front privacy policy URL: $TAIGA_PRIVACY_POLICY_URL"
+if [ -n "${TAIGA_PRIVACY_POLICY_URL}" ]; then
+  log "Updating Taiga Front privacy policy URL: ${TAIGA_PRIVACY_POLICY_URL}"
   sed -i \
-    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"$TAIGA_PRIVACY_POLICY_URL\",|g" \
+    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"${TAIGA_PRIVACY_POLICY_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front privacy policy URL"
@@ -141,10 +141,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_TOS_URL" ]; then
-  log "Updating Taiga Front terms of services URL: $TAIGA_TOS_URL"
+if [ -n "${TAIGA_TOS_URL}" ]; then
+  log "Updating Taiga Front terms of services URL: ${TAIGA_TOS_URL}"
   sed -i \
-    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"$TAIGA_TOS_URL\",|g" \
+    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"${TAIGA_TOS_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front terms of services URL"
@@ -153,10 +153,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GDPR_URL" ]; then
-  log "Updating Taiga Front GDPR compliance URL: $TAIGA_GDPR_URL"
+if [ -n "${TAIGA_GDPR_URL}" ]; then
+  log "Updating Taiga Front GDPR compliance URL: ${TAIGA_GDPR_URL}"
   sed -i \
-    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"$TAIGA_GDPR_URL\",|g" \
+    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"${TAIGA_GDPR_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR compliance URL"
@@ -165,10 +165,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_MAX_UPLOAD_SIZE" ]; then
-  log "Updating Taiga Front max upload file size: $TAIGA_MAX_UPLOAD_SIZE"
+if [ -n "${TAIGA_MAX_UPLOAD_SIZE}" ]; then
+  log "Updating Taiga Front max upload file size: ${TAIGA_MAX_UPLOAD_SIZE}"
   sed -i \
-    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": $TAIGA_MAX_UPLOAD_SIZE,|g" \
+    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": ${TAIGA_MAX_UPLOAD_SIZE},|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR URL"
@@ -177,10 +177,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_CONTRIB_PLUGINS" ]; then
-  log "Updating Taiga Front contribution plugins list: $TAIGA_CONTRIB_PLUGINS"
+if [ -n "${TAIGA_CONTRIB_PLUGINS}" ]; then
+  log "Updating Taiga Front contribution plugins list: ${TAIGA_CONTRIB_PLUGINS}"
   plugins_list=
-  for plugin in $TAIGA_CONTRIB_PLUGINS ; do
+  for plugin in ${TAIGA_CONTRIB_PLUGINS} ; do
     plugins_list="$plugins_list\"/plugins/$plugin/$plugin.json\", ";
   done
   sed -i \
@@ -193,10 +193,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTERS" ]; then
-  log "Updating Taiga Front importers list: $TAIGA_IMPORTERS"
+if [ -n "${TAIGA_IMPORTERS}" ]; then
+  log "Updating Taiga Front importers list: ${TAIGA_IMPORTERS}"
   importers_list=
-  for importer in $TAIGA_IMPORTERS ; do
+  for importer in ${TAIGA_IMPORTERS} ; do
     importers_list="$importers_list \"$importer\",";
   done
   sed -i \
@@ -209,45 +209,45 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_GITHUB_ENABLED" ]; then
-  log "Updating Taiga Front GitHub importer status: $TAIGA_IMPORTER_GITHUB_ENABLED"
+if [ -n "${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}" ]; then
+  log "Updating Taiga Front GitHub importer status: ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}"
   sed -i \
-    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": $TAIGA_IMPORTER_GITHUB_ENABLED,|g" \
+    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_JIRA_ENABLED" ]; then
-  log "Updating Taiga Front Jira importer status: $TAIGA_IMPORTER_JIRA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}" ]; then
+  log "Updating Taiga Front Jira importer status: ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}"
   sed -i \
-    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": $TAIGA_IMPORTER_JIRA_ENABLED,|g" \
+    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_TRELLO_ENABLED" ]; then
-  log "Updating Taiga Front Trello importer status: $TAIGA_IMPORTER_TRELLO_ENABLED"
+if [ -n "${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}" ]; then
+  log "Updating Taiga Front Trello importer status: ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}"
   sed -i \
-    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": $TAIGA_IMPORTER_TRELLO_ENABLED,|g" \
+    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_ASANA_ENABLED" ]; then
-  log "Updating Taiga Front Asana importer status: $TAIGA_IMPORTER_ASANA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}" ]; then
+  log "Updating Taiga Front Asana importer status: ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}"
   sed -i \
-    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": $TAIGA_IMPORTER_ASANA_ENABLED,|g" \
+    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GRAVATAR" ]; then
-  log "Updating Taiga Front Gravatar status: $TAIGA_GRAVATAR"
+if [ -n "${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}" ]; then
+  log "Updating Taiga Front Gravatar status: ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}"
   sed -i \
-    -e "s|\"gravatar\": .*,|\"gravatar\": $TAIGA_GRAVATAR,|g" \
+    -e "s|\"gravatar\": .*,|\"gravatar\": ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_LOGIN_FORM_TYPE" ]; then
-  log "Updating Taiga Front login form type: $TAIGA_LOGIN_FORM_TYPE"
+if [ -n "${TAIGA_LOGIN_FORM_TYPE}" ]; then
+  log "Updating Taiga Front login form type: ${TAIGA_LOGIN_FORM_TYPE}"
   sed -i \
-    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"$TAIGA_LOGIN_FORM_TYPE\"|g" \
+    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"${TAIGA_LOGIN_FORM_TYPE}\"|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front login form type"
@@ -265,8 +265,8 @@ if [ -d /etc/nginx/conf.d/ ]; then
   rm -f /etc/nginx/conf.d/*.conf
 fi
 
-if [ "$TAIGA_SSL" = "True" ]; then
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ "${TAIGA_SSL}" = "True" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events-ssl.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -276,7 +276,7 @@ if [ "$TAIGA_SSL" = "True" ]; then
       /etc/nginx/conf.d/taiga.conf
   fi
 else
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -288,7 +288,7 @@ else
 fi
 
 # Update proxy pass if backend served with SSL
-if [ "$TAIGA_BACKEND_SSL" = "True" ]; then
+if [ "${TAIGA_BACKEND_SSL}" = "True" ]; then
   sed -i \
     -e "s|http://|https://|g" \
     /etc/nginx/snippets/api.conf
@@ -299,18 +299,18 @@ else
 fi
 
 # Look to see if we should update the backend connection
-if [ -n "$TAIGA_BACK_HOST" ]; then
-  log "Updating Taiga Back connection: $TAIGA_BACK_HOST"
+if [ -n "${TAIGA_BACK_HOST}" ]; then
+  log "Updating Taiga Back connection: ${TAIGA_BACK_HOST}"
   sed -i \
-    -e "s|server .*;|server $TAIGA_BACK_HOST:$TAIGA_BACK_PORT;|g" \
+    -e "s|server .*;|server ${TAIGA_BACK_HOST}:${TAIGA_BACK_PORT:-8001};|g" \
     /etc/nginx/snippets/upstream.conf
 fi
 
 # Look to see if we should update the events connection
-if [ -n "$TAIGA_EVENTS_HOST" ]; then
-  log "Updating Taiga Events connection: $TAIGA_EVENTS_HOST"
+if [ -n "${TAIGA_EVENTS_HOST}" ]; then
+  log "Updating Taiga Events connection: ${TAIGA_EVENTS_HOST}"
   sed -i \
-    -e "s|proxy_pass http://.*/events|proxy_pass http://$TAIGA_EVENTS_HOST:$TAIGA_EVENTS_PORT/events|g" \
+    -e "s|proxy_pass http://.*/events|proxy_pass http://${TAIGA_EVENTS_HOST}:${TAIGA_EVENTS_PORT:-8888}/events|g" \
     /etc/nginx/snippets/events.conf
 fi
 
diff --git a/images/5.0/alpine/entrypoint.sh b/images/5.0/alpine/entrypoint.sh
index cb8d5dd..2e7b544 100755
--- a/images/5.0/alpine/entrypoint.sh
+++ b/images/5.0/alpine/entrypoint.sh
@@ -23,13 +23,13 @@ fi
 #########################################
 
 # Automatically replace "TAIGA_HOSTNAME" with the environment variable
-sed -i "s|TAIGA_HOSTNAME|$TAIGA_HOSTNAME|g" /taiga/conf.json
+sed -i "s|TAIGA_HOSTNAME|${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}|g" /taiga/conf.json
 
 # Look to see if we should set the "eventsUrl"
-if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
   log "Enabling Taiga Events"
   sed -i \
-    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://$TAIGA_HOSTNAME/events\",|g" \
+    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}/events\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Events"
@@ -39,13 +39,13 @@ else
 fi
 
 # Handle enabling/disabling SSL
-if [ "$TAIGA_SSL_BY_REVERSE_PROXY" = "True" ]; then
+if [ "${TAIGA_SSL_BY_REVERSE_PROXY}" = "True" ]; then
   log "Enabling external SSL support! SSL handling must be done by a reverse proxy or a similar system"
   sed -i \
     -e "s|http://|https://|g" \
     -e "s|ws://|wss://|g" \
     /taiga/conf.json
-elif [ "$TAIGA_SSL" = "True" ]; then
+elif [ "${TAIGA_SSL}" = "True" ]; then
   log "Enabling SSL support!"
   sed -i \
     -e "s|http://|https://|g" \
@@ -59,31 +59,31 @@ elif grep -q "wss://" "/taiga/conf.json"; then
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG" ]; then
-  log "Updating Taiga Front debug status: $TAIGA_DEBUG"
+if [ -n "${TAIGA_DEBUG}" ]; then
+  log "Updating Taiga Front debug status: ${TAIGA_DEBUG}"
   sed -i \
-    -e "s|\"debug\": .*,|\"debug\": $TAIGA_DEBUG,|g" \
+    -e "s|\"debug\": .*,|\"debug\": ${TAIGA_DEBUG},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG_INFO" ]; then
-  log "Updating Taiga Front debug info status: $TAIGA_DEBUG_INFO"
+if [ -n "${TAIGA_DEBUG_INFO}" ]; then
+  log "Updating Taiga Front debug info status: ${TAIGA_DEBUG_INFO}"
   sed -i \
-    -e "s|\"debugInfo\": .*,|\"debugInfo\": $TAIGA_DEBUG_INFO,|g" \
+    -e "s|\"debugInfo\": .*,|\"debugInfo\": ${TAIGA_DEBUG_INFO},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_LANGUAGE" ]; then
-  log "Updating Taiga Front default language: $TAIGA_DEFAULT_LANGUAGE"
+if [ -n "${TAIGA_DEFAULT_LANGUAGE}" ]; then
+  log "Updating Taiga Front default language: ${TAIGA_DEFAULT_LANGUAGE}"
   sed -i \
-    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"$TAIGA_DEFAULT_LANGUAGE\"|g" \
+    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"${TAIGA_DEFAULT_LANGUAGE}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_THEMES" ]; then
-  log "Updating Taiga Front themes list: $TAIGA_THEMES"
+if [ -n "${TAIGA_THEMES}" ]; then
+  log "Updating Taiga Front themes list: ${TAIGA_THEMES}"
   themes_list=
-  for theme in $TAIGA_THEMES ; do
+  for theme in ${TAIGA_THEMES} ; do
     themes_list="$themes_list\"$theme\", ";
   done
   sed -i \
@@ -96,31 +96,31 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_THEME" ]; then
-  log "Updating Taiga Front default theme: $TAIGA_DEFAULT_THEME"
+if [ -n "${TAIGA_DEFAULT_THEME}" ]; then
+  log "Updating Taiga Front default theme: ${TAIGA_DEFAULT_THEME}"
   sed -i \
-    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"$TAIGA_DEFAULT_THEME\"|g" \
+    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"${TAIGA_DEFAULT_THEME}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PUBLIC_REGISTER_ENABLED" ]; then
-  log "Updating Taiga Front public registration status: $TAIGA_PUBLIC_REGISTER_ENABLED"
+if [ -n "${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}" ]; then
+  log "Updating Taiga Front public registration status: ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}"
   sed -i \
-    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": $TAIGA_PUBLIC_REGISTER_ENABLED,|g" \
+    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_FEEDBACK_ENABLED" ]; then
-  log "Updating Taiga Front feedback status: $TAIGA_FEEDBACK_ENABLED"
+if [ -n "${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}" ]; then
+  log "Updating Taiga Front feedback status: ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}"
   sed -i \
-    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": $TAIGA_FEEDBACK_ENABLED,|g" \
+    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_SUPPORT_URL" ]; then
-  log "Updating Taiga Front support URL: $TAIGA_SUPPORT_URL"
+if [ -n "${TAIGA_SUPPORT_URL}" ]; then
+  log "Updating Taiga Front support URL: ${TAIGA_SUPPORT_URL}"
   sed -i \
-    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"$TAIGA_SUPPORT_URL\",|g" \
+    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"${TAIGA_SUPPORT_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front support URL"
@@ -129,10 +129,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PRIVACY_POLICY_URL" ]; then
-  log "Updating Taiga Front privacy policy URL: $TAIGA_PRIVACY_POLICY_URL"
+if [ -n "${TAIGA_PRIVACY_POLICY_URL}" ]; then
+  log "Updating Taiga Front privacy policy URL: ${TAIGA_PRIVACY_POLICY_URL}"
   sed -i \
-    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"$TAIGA_PRIVACY_POLICY_URL\",|g" \
+    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"${TAIGA_PRIVACY_POLICY_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front privacy policy URL"
@@ -141,10 +141,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_TOS_URL" ]; then
-  log "Updating Taiga Front terms of services URL: $TAIGA_TOS_URL"
+if [ -n "${TAIGA_TOS_URL}" ]; then
+  log "Updating Taiga Front terms of services URL: ${TAIGA_TOS_URL}"
   sed -i \
-    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"$TAIGA_TOS_URL\",|g" \
+    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"${TAIGA_TOS_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front terms of services URL"
@@ -153,10 +153,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GDPR_URL" ]; then
-  log "Updating Taiga Front GDPR compliance URL: $TAIGA_GDPR_URL"
+if [ -n "${TAIGA_GDPR_URL}" ]; then
+  log "Updating Taiga Front GDPR compliance URL: ${TAIGA_GDPR_URL}"
   sed -i \
-    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"$TAIGA_GDPR_URL\",|g" \
+    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"${TAIGA_GDPR_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR compliance URL"
@@ -165,10 +165,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_MAX_UPLOAD_SIZE" ]; then
-  log "Updating Taiga Front max upload file size: $TAIGA_MAX_UPLOAD_SIZE"
+if [ -n "${TAIGA_MAX_UPLOAD_SIZE}" ]; then
+  log "Updating Taiga Front max upload file size: ${TAIGA_MAX_UPLOAD_SIZE}"
   sed -i \
-    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": $TAIGA_MAX_UPLOAD_SIZE,|g" \
+    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": ${TAIGA_MAX_UPLOAD_SIZE},|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR URL"
@@ -177,10 +177,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_CONTRIB_PLUGINS" ]; then
-  log "Updating Taiga Front contribution plugins list: $TAIGA_CONTRIB_PLUGINS"
+if [ -n "${TAIGA_CONTRIB_PLUGINS}" ]; then
+  log "Updating Taiga Front contribution plugins list: ${TAIGA_CONTRIB_PLUGINS}"
   plugins_list=
-  for plugin in $TAIGA_CONTRIB_PLUGINS ; do
+  for plugin in ${TAIGA_CONTRIB_PLUGINS} ; do
     plugins_list="$plugins_list\"/plugins/$plugin/$plugin.json\", ";
   done
   sed -i \
@@ -193,10 +193,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTERS" ]; then
-  log "Updating Taiga Front importers list: $TAIGA_IMPORTERS"
+if [ -n "${TAIGA_IMPORTERS}" ]; then
+  log "Updating Taiga Front importers list: ${TAIGA_IMPORTERS}"
   importers_list=
-  for importer in $TAIGA_IMPORTERS ; do
+  for importer in ${TAIGA_IMPORTERS} ; do
     importers_list="$importers_list \"$importer\",";
   done
   sed -i \
@@ -209,45 +209,45 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_GITHUB_ENABLED" ]; then
-  log "Updating Taiga Front GitHub importer status: $TAIGA_IMPORTER_GITHUB_ENABLED"
+if [ -n "${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}" ]; then
+  log "Updating Taiga Front GitHub importer status: ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}"
   sed -i \
-    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": $TAIGA_IMPORTER_GITHUB_ENABLED,|g" \
+    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_JIRA_ENABLED" ]; then
-  log "Updating Taiga Front Jira importer status: $TAIGA_IMPORTER_JIRA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}" ]; then
+  log "Updating Taiga Front Jira importer status: ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}"
   sed -i \
-    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": $TAIGA_IMPORTER_JIRA_ENABLED,|g" \
+    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_TRELLO_ENABLED" ]; then
-  log "Updating Taiga Front Trello importer status: $TAIGA_IMPORTER_TRELLO_ENABLED"
+if [ -n "${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}" ]; then
+  log "Updating Taiga Front Trello importer status: ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}"
   sed -i \
-    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": $TAIGA_IMPORTER_TRELLO_ENABLED,|g" \
+    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_ASANA_ENABLED" ]; then
-  log "Updating Taiga Front Asana importer status: $TAIGA_IMPORTER_ASANA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}" ]; then
+  log "Updating Taiga Front Asana importer status: ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}"
   sed -i \
-    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": $TAIGA_IMPORTER_ASANA_ENABLED,|g" \
+    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GRAVATAR" ]; then
-  log "Updating Taiga Front Gravatar status: $TAIGA_GRAVATAR"
+if [ -n "${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}" ]; then
+  log "Updating Taiga Front Gravatar status: ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}"
   sed -i \
-    -e "s|\"gravatar\": .*,|\"gravatar\": $TAIGA_GRAVATAR,|g" \
+    -e "s|\"gravatar\": .*,|\"gravatar\": ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_LOGIN_FORM_TYPE" ]; then
-  log "Updating Taiga Front login form type: $TAIGA_LOGIN_FORM_TYPE"
+if [ -n "${TAIGA_LOGIN_FORM_TYPE}" ]; then
+  log "Updating Taiga Front login form type: ${TAIGA_LOGIN_FORM_TYPE}"
   sed -i \
-    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"$TAIGA_LOGIN_FORM_TYPE\"|g" \
+    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"${TAIGA_LOGIN_FORM_TYPE}\"|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front login form type"
@@ -265,8 +265,8 @@ if [ -d /etc/nginx/conf.d/ ]; then
   rm -f /etc/nginx/conf.d/*.conf
 fi
 
-if [ "$TAIGA_SSL" = "True" ]; then
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ "${TAIGA_SSL}" = "True" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events-ssl.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -276,7 +276,7 @@ if [ "$TAIGA_SSL" = "True" ]; then
       /etc/nginx/conf.d/taiga.conf
   fi
 else
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -288,7 +288,7 @@ else
 fi
 
 # Update proxy pass if backend served with SSL
-if [ "$TAIGA_BACKEND_SSL" = "True" ]; then
+if [ "${TAIGA_BACKEND_SSL}" = "True" ]; then
   sed -i \
     -e "s|http://|https://|g" \
     /etc/nginx/snippets/api.conf
@@ -299,18 +299,18 @@ else
 fi
 
 # Look to see if we should update the backend connection
-if [ -n "$TAIGA_BACK_HOST" ]; then
-  log "Updating Taiga Back connection: $TAIGA_BACK_HOST"
+if [ -n "${TAIGA_BACK_HOST}" ]; then
+  log "Updating Taiga Back connection: ${TAIGA_BACK_HOST}"
   sed -i \
-    -e "s|server .*;|server $TAIGA_BACK_HOST:$TAIGA_BACK_PORT;|g" \
+    -e "s|server .*;|server ${TAIGA_BACK_HOST}:${TAIGA_BACK_PORT:-8001};|g" \
     /etc/nginx/snippets/upstream.conf
 fi
 
 # Look to see if we should update the events connection
-if [ -n "$TAIGA_EVENTS_HOST" ]; then
-  log "Updating Taiga Events connection: $TAIGA_EVENTS_HOST"
+if [ -n "${TAIGA_EVENTS_HOST}" ]; then
+  log "Updating Taiga Events connection: ${TAIGA_EVENTS_HOST}"
   sed -i \
-    -e "s|proxy_pass http://.*/events|proxy_pass http://$TAIGA_EVENTS_HOST:$TAIGA_EVENTS_PORT/events|g" \
+    -e "s|proxy_pass http://.*/events|proxy_pass http://${TAIGA_EVENTS_HOST}:${TAIGA_EVENTS_PORT:-8888}/events|g" \
     /etc/nginx/snippets/events.conf
 fi
 
diff --git a/images/5.5/alpine/entrypoint.sh b/images/5.5/alpine/entrypoint.sh
index cb8d5dd..2e7b544 100755
--- a/images/5.5/alpine/entrypoint.sh
+++ b/images/5.5/alpine/entrypoint.sh
@@ -23,13 +23,13 @@ fi
 #########################################
 
 # Automatically replace "TAIGA_HOSTNAME" with the environment variable
-sed -i "s|TAIGA_HOSTNAME|$TAIGA_HOSTNAME|g" /taiga/conf.json
+sed -i "s|TAIGA_HOSTNAME|${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}|g" /taiga/conf.json
 
 # Look to see if we should set the "eventsUrl"
-if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
   log "Enabling Taiga Events"
   sed -i \
-    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://$TAIGA_HOSTNAME/events\",|g" \
+    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}/events\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Events"
@@ -39,13 +39,13 @@ else
 fi
 
 # Handle enabling/disabling SSL
-if [ "$TAIGA_SSL_BY_REVERSE_PROXY" = "True" ]; then
+if [ "${TAIGA_SSL_BY_REVERSE_PROXY}" = "True" ]; then
   log "Enabling external SSL support! SSL handling must be done by a reverse proxy or a similar system"
   sed -i \
     -e "s|http://|https://|g" \
     -e "s|ws://|wss://|g" \
     /taiga/conf.json
-elif [ "$TAIGA_SSL" = "True" ]; then
+elif [ "${TAIGA_SSL}" = "True" ]; then
   log "Enabling SSL support!"
   sed -i \
     -e "s|http://|https://|g" \
@@ -59,31 +59,31 @@ elif grep -q "wss://" "/taiga/conf.json"; then
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG" ]; then
-  log "Updating Taiga Front debug status: $TAIGA_DEBUG"
+if [ -n "${TAIGA_DEBUG}" ]; then
+  log "Updating Taiga Front debug status: ${TAIGA_DEBUG}"
   sed -i \
-    -e "s|\"debug\": .*,|\"debug\": $TAIGA_DEBUG,|g" \
+    -e "s|\"debug\": .*,|\"debug\": ${TAIGA_DEBUG},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG_INFO" ]; then
-  log "Updating Taiga Front debug info status: $TAIGA_DEBUG_INFO"
+if [ -n "${TAIGA_DEBUG_INFO}" ]; then
+  log "Updating Taiga Front debug info status: ${TAIGA_DEBUG_INFO}"
   sed -i \
-    -e "s|\"debugInfo\": .*,|\"debugInfo\": $TAIGA_DEBUG_INFO,|g" \
+    -e "s|\"debugInfo\": .*,|\"debugInfo\": ${TAIGA_DEBUG_INFO},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_LANGUAGE" ]; then
-  log "Updating Taiga Front default language: $TAIGA_DEFAULT_LANGUAGE"
+if [ -n "${TAIGA_DEFAULT_LANGUAGE}" ]; then
+  log "Updating Taiga Front default language: ${TAIGA_DEFAULT_LANGUAGE}"
   sed -i \
-    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"$TAIGA_DEFAULT_LANGUAGE\"|g" \
+    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"${TAIGA_DEFAULT_LANGUAGE}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_THEMES" ]; then
-  log "Updating Taiga Front themes list: $TAIGA_THEMES"
+if [ -n "${TAIGA_THEMES}" ]; then
+  log "Updating Taiga Front themes list: ${TAIGA_THEMES}"
   themes_list=
-  for theme in $TAIGA_THEMES ; do
+  for theme in ${TAIGA_THEMES} ; do
     themes_list="$themes_list\"$theme\", ";
   done
   sed -i \
@@ -96,31 +96,31 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_THEME" ]; then
-  log "Updating Taiga Front default theme: $TAIGA_DEFAULT_THEME"
+if [ -n "${TAIGA_DEFAULT_THEME}" ]; then
+  log "Updating Taiga Front default theme: ${TAIGA_DEFAULT_THEME}"
   sed -i \
-    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"$TAIGA_DEFAULT_THEME\"|g" \
+    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"${TAIGA_DEFAULT_THEME}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PUBLIC_REGISTER_ENABLED" ]; then
-  log "Updating Taiga Front public registration status: $TAIGA_PUBLIC_REGISTER_ENABLED"
+if [ -n "${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}" ]; then
+  log "Updating Taiga Front public registration status: ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}"
   sed -i \
-    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": $TAIGA_PUBLIC_REGISTER_ENABLED,|g" \
+    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_FEEDBACK_ENABLED" ]; then
-  log "Updating Taiga Front feedback status: $TAIGA_FEEDBACK_ENABLED"
+if [ -n "${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}" ]; then
+  log "Updating Taiga Front feedback status: ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}"
   sed -i \
-    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": $TAIGA_FEEDBACK_ENABLED,|g" \
+    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_SUPPORT_URL" ]; then
-  log "Updating Taiga Front support URL: $TAIGA_SUPPORT_URL"
+if [ -n "${TAIGA_SUPPORT_URL}" ]; then
+  log "Updating Taiga Front support URL: ${TAIGA_SUPPORT_URL}"
   sed -i \
-    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"$TAIGA_SUPPORT_URL\",|g" \
+    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"${TAIGA_SUPPORT_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front support URL"
@@ -129,10 +129,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PRIVACY_POLICY_URL" ]; then
-  log "Updating Taiga Front privacy policy URL: $TAIGA_PRIVACY_POLICY_URL"
+if [ -n "${TAIGA_PRIVACY_POLICY_URL}" ]; then
+  log "Updating Taiga Front privacy policy URL: ${TAIGA_PRIVACY_POLICY_URL}"
   sed -i \
-    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"$TAIGA_PRIVACY_POLICY_URL\",|g" \
+    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"${TAIGA_PRIVACY_POLICY_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front privacy policy URL"
@@ -141,10 +141,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_TOS_URL" ]; then
-  log "Updating Taiga Front terms of services URL: $TAIGA_TOS_URL"
+if [ -n "${TAIGA_TOS_URL}" ]; then
+  log "Updating Taiga Front terms of services URL: ${TAIGA_TOS_URL}"
   sed -i \
-    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"$TAIGA_TOS_URL\",|g" \
+    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"${TAIGA_TOS_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front terms of services URL"
@@ -153,10 +153,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GDPR_URL" ]; then
-  log "Updating Taiga Front GDPR compliance URL: $TAIGA_GDPR_URL"
+if [ -n "${TAIGA_GDPR_URL}" ]; then
+  log "Updating Taiga Front GDPR compliance URL: ${TAIGA_GDPR_URL}"
   sed -i \
-    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"$TAIGA_GDPR_URL\",|g" \
+    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"${TAIGA_GDPR_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR compliance URL"
@@ -165,10 +165,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_MAX_UPLOAD_SIZE" ]; then
-  log "Updating Taiga Front max upload file size: $TAIGA_MAX_UPLOAD_SIZE"
+if [ -n "${TAIGA_MAX_UPLOAD_SIZE}" ]; then
+  log "Updating Taiga Front max upload file size: ${TAIGA_MAX_UPLOAD_SIZE}"
   sed -i \
-    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": $TAIGA_MAX_UPLOAD_SIZE,|g" \
+    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": ${TAIGA_MAX_UPLOAD_SIZE},|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR URL"
@@ -177,10 +177,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_CONTRIB_PLUGINS" ]; then
-  log "Updating Taiga Front contribution plugins list: $TAIGA_CONTRIB_PLUGINS"
+if [ -n "${TAIGA_CONTRIB_PLUGINS}" ]; then
+  log "Updating Taiga Front contribution plugins list: ${TAIGA_CONTRIB_PLUGINS}"
   plugins_list=
-  for plugin in $TAIGA_CONTRIB_PLUGINS ; do
+  for plugin in ${TAIGA_CONTRIB_PLUGINS} ; do
     plugins_list="$plugins_list\"/plugins/$plugin/$plugin.json\", ";
   done
   sed -i \
@@ -193,10 +193,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTERS" ]; then
-  log "Updating Taiga Front importers list: $TAIGA_IMPORTERS"
+if [ -n "${TAIGA_IMPORTERS}" ]; then
+  log "Updating Taiga Front importers list: ${TAIGA_IMPORTERS}"
   importers_list=
-  for importer in $TAIGA_IMPORTERS ; do
+  for importer in ${TAIGA_IMPORTERS} ; do
     importers_list="$importers_list \"$importer\",";
   done
   sed -i \
@@ -209,45 +209,45 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_GITHUB_ENABLED" ]; then
-  log "Updating Taiga Front GitHub importer status: $TAIGA_IMPORTER_GITHUB_ENABLED"
+if [ -n "${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}" ]; then
+  log "Updating Taiga Front GitHub importer status: ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}"
   sed -i \
-    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": $TAIGA_IMPORTER_GITHUB_ENABLED,|g" \
+    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_JIRA_ENABLED" ]; then
-  log "Updating Taiga Front Jira importer status: $TAIGA_IMPORTER_JIRA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}" ]; then
+  log "Updating Taiga Front Jira importer status: ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}"
   sed -i \
-    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": $TAIGA_IMPORTER_JIRA_ENABLED,|g" \
+    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_TRELLO_ENABLED" ]; then
-  log "Updating Taiga Front Trello importer status: $TAIGA_IMPORTER_TRELLO_ENABLED"
+if [ -n "${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}" ]; then
+  log "Updating Taiga Front Trello importer status: ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}"
   sed -i \
-    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": $TAIGA_IMPORTER_TRELLO_ENABLED,|g" \
+    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_ASANA_ENABLED" ]; then
-  log "Updating Taiga Front Asana importer status: $TAIGA_IMPORTER_ASANA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}" ]; then
+  log "Updating Taiga Front Asana importer status: ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}"
   sed -i \
-    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": $TAIGA_IMPORTER_ASANA_ENABLED,|g" \
+    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GRAVATAR" ]; then
-  log "Updating Taiga Front Gravatar status: $TAIGA_GRAVATAR"
+if [ -n "${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}" ]; then
+  log "Updating Taiga Front Gravatar status: ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}"
   sed -i \
-    -e "s|\"gravatar\": .*,|\"gravatar\": $TAIGA_GRAVATAR,|g" \
+    -e "s|\"gravatar\": .*,|\"gravatar\": ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_LOGIN_FORM_TYPE" ]; then
-  log "Updating Taiga Front login form type: $TAIGA_LOGIN_FORM_TYPE"
+if [ -n "${TAIGA_LOGIN_FORM_TYPE}" ]; then
+  log "Updating Taiga Front login form type: ${TAIGA_LOGIN_FORM_TYPE}"
   sed -i \
-    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"$TAIGA_LOGIN_FORM_TYPE\"|g" \
+    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"${TAIGA_LOGIN_FORM_TYPE}\"|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front login form type"
@@ -265,8 +265,8 @@ if [ -d /etc/nginx/conf.d/ ]; then
   rm -f /etc/nginx/conf.d/*.conf
 fi
 
-if [ "$TAIGA_SSL" = "True" ]; then
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ "${TAIGA_SSL}" = "True" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events-ssl.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -276,7 +276,7 @@ if [ "$TAIGA_SSL" = "True" ]; then
       /etc/nginx/conf.d/taiga.conf
   fi
 else
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -288,7 +288,7 @@ else
 fi
 
 # Update proxy pass if backend served with SSL
-if [ "$TAIGA_BACKEND_SSL" = "True" ]; then
+if [ "${TAIGA_BACKEND_SSL}" = "True" ]; then
   sed -i \
     -e "s|http://|https://|g" \
     /etc/nginx/snippets/api.conf
@@ -299,18 +299,18 @@ else
 fi
 
 # Look to see if we should update the backend connection
-if [ -n "$TAIGA_BACK_HOST" ]; then
-  log "Updating Taiga Back connection: $TAIGA_BACK_HOST"
+if [ -n "${TAIGA_BACK_HOST}" ]; then
+  log "Updating Taiga Back connection: ${TAIGA_BACK_HOST}"
   sed -i \
-    -e "s|server .*;|server $TAIGA_BACK_HOST:$TAIGA_BACK_PORT;|g" \
+    -e "s|server .*;|server ${TAIGA_BACK_HOST}:${TAIGA_BACK_PORT:-8001};|g" \
     /etc/nginx/snippets/upstream.conf
 fi
 
 # Look to see if we should update the events connection
-if [ -n "$TAIGA_EVENTS_HOST" ]; then
-  log "Updating Taiga Events connection: $TAIGA_EVENTS_HOST"
+if [ -n "${TAIGA_EVENTS_HOST}" ]; then
+  log "Updating Taiga Events connection: ${TAIGA_EVENTS_HOST}"
   sed -i \
-    -e "s|proxy_pass http://.*/events|proxy_pass http://$TAIGA_EVENTS_HOST:$TAIGA_EVENTS_PORT/events|g" \
+    -e "s|proxy_pass http://.*/events|proxy_pass http://${TAIGA_EVENTS_HOST}:${TAIGA_EVENTS_PORT:-8888}/events|g" \
     /etc/nginx/snippets/events.conf
 fi
 
diff --git a/images/6.0/alpine/entrypoint.sh b/images/6.0/alpine/entrypoint.sh
index cb8d5dd..2e7b544 100755
--- a/images/6.0/alpine/entrypoint.sh
+++ b/images/6.0/alpine/entrypoint.sh
@@ -23,13 +23,13 @@ fi
 #########################################
 
 # Automatically replace "TAIGA_HOSTNAME" with the environment variable
-sed -i "s|TAIGA_HOSTNAME|$TAIGA_HOSTNAME|g" /taiga/conf.json
+sed -i "s|TAIGA_HOSTNAME|${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}|g" /taiga/conf.json
 
 # Look to see if we should set the "eventsUrl"
-if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
   log "Enabling Taiga Events"
   sed -i \
-    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://$TAIGA_HOSTNAME/events\",|g" \
+    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}/events\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Events"
@@ -39,13 +39,13 @@ else
 fi
 
 # Handle enabling/disabling SSL
-if [ "$TAIGA_SSL_BY_REVERSE_PROXY" = "True" ]; then
+if [ "${TAIGA_SSL_BY_REVERSE_PROXY}" = "True" ]; then
   log "Enabling external SSL support! SSL handling must be done by a reverse proxy or a similar system"
   sed -i \
     -e "s|http://|https://|g" \
     -e "s|ws://|wss://|g" \
     /taiga/conf.json
-elif [ "$TAIGA_SSL" = "True" ]; then
+elif [ "${TAIGA_SSL}" = "True" ]; then
   log "Enabling SSL support!"
   sed -i \
     -e "s|http://|https://|g" \
@@ -59,31 +59,31 @@ elif grep -q "wss://" "/taiga/conf.json"; then
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG" ]; then
-  log "Updating Taiga Front debug status: $TAIGA_DEBUG"
+if [ -n "${TAIGA_DEBUG}" ]; then
+  log "Updating Taiga Front debug status: ${TAIGA_DEBUG}"
   sed -i \
-    -e "s|\"debug\": .*,|\"debug\": $TAIGA_DEBUG,|g" \
+    -e "s|\"debug\": .*,|\"debug\": ${TAIGA_DEBUG},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG_INFO" ]; then
-  log "Updating Taiga Front debug info status: $TAIGA_DEBUG_INFO"
+if [ -n "${TAIGA_DEBUG_INFO}" ]; then
+  log "Updating Taiga Front debug info status: ${TAIGA_DEBUG_INFO}"
   sed -i \
-    -e "s|\"debugInfo\": .*,|\"debugInfo\": $TAIGA_DEBUG_INFO,|g" \
+    -e "s|\"debugInfo\": .*,|\"debugInfo\": ${TAIGA_DEBUG_INFO},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_LANGUAGE" ]; then
-  log "Updating Taiga Front default language: $TAIGA_DEFAULT_LANGUAGE"
+if [ -n "${TAIGA_DEFAULT_LANGUAGE}" ]; then
+  log "Updating Taiga Front default language: ${TAIGA_DEFAULT_LANGUAGE}"
   sed -i \
-    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"$TAIGA_DEFAULT_LANGUAGE\"|g" \
+    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"${TAIGA_DEFAULT_LANGUAGE}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_THEMES" ]; then
-  log "Updating Taiga Front themes list: $TAIGA_THEMES"
+if [ -n "${TAIGA_THEMES}" ]; then
+  log "Updating Taiga Front themes list: ${TAIGA_THEMES}"
   themes_list=
-  for theme in $TAIGA_THEMES ; do
+  for theme in ${TAIGA_THEMES} ; do
     themes_list="$themes_list\"$theme\", ";
   done
   sed -i \
@@ -96,31 +96,31 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_THEME" ]; then
-  log "Updating Taiga Front default theme: $TAIGA_DEFAULT_THEME"
+if [ -n "${TAIGA_DEFAULT_THEME}" ]; then
+  log "Updating Taiga Front default theme: ${TAIGA_DEFAULT_THEME}"
   sed -i \
-    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"$TAIGA_DEFAULT_THEME\"|g" \
+    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"${TAIGA_DEFAULT_THEME}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PUBLIC_REGISTER_ENABLED" ]; then
-  log "Updating Taiga Front public registration status: $TAIGA_PUBLIC_REGISTER_ENABLED"
+if [ -n "${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}" ]; then
+  log "Updating Taiga Front public registration status: ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}"
   sed -i \
-    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": $TAIGA_PUBLIC_REGISTER_ENABLED,|g" \
+    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_FEEDBACK_ENABLED" ]; then
-  log "Updating Taiga Front feedback status: $TAIGA_FEEDBACK_ENABLED"
+if [ -n "${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}" ]; then
+  log "Updating Taiga Front feedback status: ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}"
   sed -i \
-    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": $TAIGA_FEEDBACK_ENABLED,|g" \
+    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_SUPPORT_URL" ]; then
-  log "Updating Taiga Front support URL: $TAIGA_SUPPORT_URL"
+if [ -n "${TAIGA_SUPPORT_URL}" ]; then
+  log "Updating Taiga Front support URL: ${TAIGA_SUPPORT_URL}"
   sed -i \
-    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"$TAIGA_SUPPORT_URL\",|g" \
+    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"${TAIGA_SUPPORT_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front support URL"
@@ -129,10 +129,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PRIVACY_POLICY_URL" ]; then
-  log "Updating Taiga Front privacy policy URL: $TAIGA_PRIVACY_POLICY_URL"
+if [ -n "${TAIGA_PRIVACY_POLICY_URL}" ]; then
+  log "Updating Taiga Front privacy policy URL: ${TAIGA_PRIVACY_POLICY_URL}"
   sed -i \
-    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"$TAIGA_PRIVACY_POLICY_URL\",|g" \
+    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"${TAIGA_PRIVACY_POLICY_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front privacy policy URL"
@@ -141,10 +141,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_TOS_URL" ]; then
-  log "Updating Taiga Front terms of services URL: $TAIGA_TOS_URL"
+if [ -n "${TAIGA_TOS_URL}" ]; then
+  log "Updating Taiga Front terms of services URL: ${TAIGA_TOS_URL}"
   sed -i \
-    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"$TAIGA_TOS_URL\",|g" \
+    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"${TAIGA_TOS_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front terms of services URL"
@@ -153,10 +153,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GDPR_URL" ]; then
-  log "Updating Taiga Front GDPR compliance URL: $TAIGA_GDPR_URL"
+if [ -n "${TAIGA_GDPR_URL}" ]; then
+  log "Updating Taiga Front GDPR compliance URL: ${TAIGA_GDPR_URL}"
   sed -i \
-    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"$TAIGA_GDPR_URL\",|g" \
+    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"${TAIGA_GDPR_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR compliance URL"
@@ -165,10 +165,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_MAX_UPLOAD_SIZE" ]; then
-  log "Updating Taiga Front max upload file size: $TAIGA_MAX_UPLOAD_SIZE"
+if [ -n "${TAIGA_MAX_UPLOAD_SIZE}" ]; then
+  log "Updating Taiga Front max upload file size: ${TAIGA_MAX_UPLOAD_SIZE}"
   sed -i \
-    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": $TAIGA_MAX_UPLOAD_SIZE,|g" \
+    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": ${TAIGA_MAX_UPLOAD_SIZE},|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR URL"
@@ -177,10 +177,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_CONTRIB_PLUGINS" ]; then
-  log "Updating Taiga Front contribution plugins list: $TAIGA_CONTRIB_PLUGINS"
+if [ -n "${TAIGA_CONTRIB_PLUGINS}" ]; then
+  log "Updating Taiga Front contribution plugins list: ${TAIGA_CONTRIB_PLUGINS}"
   plugins_list=
-  for plugin in $TAIGA_CONTRIB_PLUGINS ; do
+  for plugin in ${TAIGA_CONTRIB_PLUGINS} ; do
     plugins_list="$plugins_list\"/plugins/$plugin/$plugin.json\", ";
   done
   sed -i \
@@ -193,10 +193,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTERS" ]; then
-  log "Updating Taiga Front importers list: $TAIGA_IMPORTERS"
+if [ -n "${TAIGA_IMPORTERS}" ]; then
+  log "Updating Taiga Front importers list: ${TAIGA_IMPORTERS}"
   importers_list=
-  for importer in $TAIGA_IMPORTERS ; do
+  for importer in ${TAIGA_IMPORTERS} ; do
     importers_list="$importers_list \"$importer\",";
   done
   sed -i \
@@ -209,45 +209,45 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_GITHUB_ENABLED" ]; then
-  log "Updating Taiga Front GitHub importer status: $TAIGA_IMPORTER_GITHUB_ENABLED"
+if [ -n "${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}" ]; then
+  log "Updating Taiga Front GitHub importer status: ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}"
   sed -i \
-    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": $TAIGA_IMPORTER_GITHUB_ENABLED,|g" \
+    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_JIRA_ENABLED" ]; then
-  log "Updating Taiga Front Jira importer status: $TAIGA_IMPORTER_JIRA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}" ]; then
+  log "Updating Taiga Front Jira importer status: ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}"
   sed -i \
-    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": $TAIGA_IMPORTER_JIRA_ENABLED,|g" \
+    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_TRELLO_ENABLED" ]; then
-  log "Updating Taiga Front Trello importer status: $TAIGA_IMPORTER_TRELLO_ENABLED"
+if [ -n "${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}" ]; then
+  log "Updating Taiga Front Trello importer status: ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}"
   sed -i \
-    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": $TAIGA_IMPORTER_TRELLO_ENABLED,|g" \
+    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_ASANA_ENABLED" ]; then
-  log "Updating Taiga Front Asana importer status: $TAIGA_IMPORTER_ASANA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}" ]; then
+  log "Updating Taiga Front Asana importer status: ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}"
   sed -i \
-    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": $TAIGA_IMPORTER_ASANA_ENABLED,|g" \
+    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GRAVATAR" ]; then
-  log "Updating Taiga Front Gravatar status: $TAIGA_GRAVATAR"
+if [ -n "${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}" ]; then
+  log "Updating Taiga Front Gravatar status: ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}"
   sed -i \
-    -e "s|\"gravatar\": .*,|\"gravatar\": $TAIGA_GRAVATAR,|g" \
+    -e "s|\"gravatar\": .*,|\"gravatar\": ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_LOGIN_FORM_TYPE" ]; then
-  log "Updating Taiga Front login form type: $TAIGA_LOGIN_FORM_TYPE"
+if [ -n "${TAIGA_LOGIN_FORM_TYPE}" ]; then
+  log "Updating Taiga Front login form type: ${TAIGA_LOGIN_FORM_TYPE}"
   sed -i \
-    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"$TAIGA_LOGIN_FORM_TYPE\"|g" \
+    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"${TAIGA_LOGIN_FORM_TYPE}\"|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front login form type"
@@ -265,8 +265,8 @@ if [ -d /etc/nginx/conf.d/ ]; then
   rm -f /etc/nginx/conf.d/*.conf
 fi
 
-if [ "$TAIGA_SSL" = "True" ]; then
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ "${TAIGA_SSL}" = "True" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events-ssl.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -276,7 +276,7 @@ if [ "$TAIGA_SSL" = "True" ]; then
       /etc/nginx/conf.d/taiga.conf
   fi
 else
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -288,7 +288,7 @@ else
 fi
 
 # Update proxy pass if backend served with SSL
-if [ "$TAIGA_BACKEND_SSL" = "True" ]; then
+if [ "${TAIGA_BACKEND_SSL}" = "True" ]; then
   sed -i \
     -e "s|http://|https://|g" \
     /etc/nginx/snippets/api.conf
@@ -299,18 +299,18 @@ else
 fi
 
 # Look to see if we should update the backend connection
-if [ -n "$TAIGA_BACK_HOST" ]; then
-  log "Updating Taiga Back connection: $TAIGA_BACK_HOST"
+if [ -n "${TAIGA_BACK_HOST}" ]; then
+  log "Updating Taiga Back connection: ${TAIGA_BACK_HOST}"
   sed -i \
-    -e "s|server .*;|server $TAIGA_BACK_HOST:$TAIGA_BACK_PORT;|g" \
+    -e "s|server .*;|server ${TAIGA_BACK_HOST}:${TAIGA_BACK_PORT:-8001};|g" \
     /etc/nginx/snippets/upstream.conf
 fi
 
 # Look to see if we should update the events connection
-if [ -n "$TAIGA_EVENTS_HOST" ]; then
-  log "Updating Taiga Events connection: $TAIGA_EVENTS_HOST"
+if [ -n "${TAIGA_EVENTS_HOST}" ]; then
+  log "Updating Taiga Events connection: ${TAIGA_EVENTS_HOST}"
   sed -i \
-    -e "s|proxy_pass http://.*/events|proxy_pass http://$TAIGA_EVENTS_HOST:$TAIGA_EVENTS_PORT/events|g" \
+    -e "s|proxy_pass http://.*/events|proxy_pass http://${TAIGA_EVENTS_HOST}:${TAIGA_EVENTS_PORT:-8888}/events|g" \
     /etc/nginx/snippets/events.conf
 fi
 
diff --git a/template/entrypoint.sh b/template/entrypoint.sh
index cb8d5dd..2e7b544 100755
--- a/template/entrypoint.sh
+++ b/template/entrypoint.sh
@@ -23,13 +23,13 @@ fi
 #########################################
 
 # Automatically replace "TAIGA_HOSTNAME" with the environment variable
-sed -i "s|TAIGA_HOSTNAME|$TAIGA_HOSTNAME|g" /taiga/conf.json
+sed -i "s|TAIGA_HOSTNAME|${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}|g" /taiga/conf.json
 
 # Look to see if we should set the "eventsUrl"
-if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
   log "Enabling Taiga Events"
   sed -i \
-    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://$TAIGA_HOSTNAME/events\",|g" \
+    -e "s|\"eventsUrl\": .*,|\"eventsUrl\": \"ws://${TAIGA_HOSTNAME:-$TAIGA_SITES_DOMAIN}/events\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Events"
@@ -39,13 +39,13 @@ else
 fi
 
 # Handle enabling/disabling SSL
-if [ "$TAIGA_SSL_BY_REVERSE_PROXY" = "True" ]; then
+if [ "${TAIGA_SSL_BY_REVERSE_PROXY}" = "True" ]; then
   log "Enabling external SSL support! SSL handling must be done by a reverse proxy or a similar system"
   sed -i \
     -e "s|http://|https://|g" \
     -e "s|ws://|wss://|g" \
     /taiga/conf.json
-elif [ "$TAIGA_SSL" = "True" ]; then
+elif [ "${TAIGA_SSL}" = "True" ]; then
   log "Enabling SSL support!"
   sed -i \
     -e "s|http://|https://|g" \
@@ -59,31 +59,31 @@ elif grep -q "wss://" "/taiga/conf.json"; then
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG" ]; then
-  log "Updating Taiga Front debug status: $TAIGA_DEBUG"
+if [ -n "${TAIGA_DEBUG}" ]; then
+  log "Updating Taiga Front debug status: ${TAIGA_DEBUG}"
   sed -i \
-    -e "s|\"debug\": .*,|\"debug\": $TAIGA_DEBUG,|g" \
+    -e "s|\"debug\": .*,|\"debug\": ${TAIGA_DEBUG},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEBUG_INFO" ]; then
-  log "Updating Taiga Front debug info status: $TAIGA_DEBUG_INFO"
+if [ -n "${TAIGA_DEBUG_INFO}" ]; then
+  log "Updating Taiga Front debug info status: ${TAIGA_DEBUG_INFO}"
   sed -i \
-    -e "s|\"debugInfo\": .*,|\"debugInfo\": $TAIGA_DEBUG_INFO,|g" \
+    -e "s|\"debugInfo\": .*,|\"debugInfo\": ${TAIGA_DEBUG_INFO},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_LANGUAGE" ]; then
-  log "Updating Taiga Front default language: $TAIGA_DEFAULT_LANGUAGE"
+if [ -n "${TAIGA_DEFAULT_LANGUAGE}" ]; then
+  log "Updating Taiga Front default language: ${TAIGA_DEFAULT_LANGUAGE}"
   sed -i \
-    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"$TAIGA_DEFAULT_LANGUAGE\"|g" \
+    -e "s|\"defaultLanguage\": \".*\"|\"defaultLanguage\": \"${TAIGA_DEFAULT_LANGUAGE}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_THEMES" ]; then
-  log "Updating Taiga Front themes list: $TAIGA_THEMES"
+if [ -n "${TAIGA_THEMES}" ]; then
+  log "Updating Taiga Front themes list: ${TAIGA_THEMES}"
   themes_list=
-  for theme in $TAIGA_THEMES ; do
+  for theme in ${TAIGA_THEMES} ; do
     themes_list="$themes_list\"$theme\", ";
   done
   sed -i \
@@ -96,31 +96,31 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_DEFAULT_THEME" ]; then
-  log "Updating Taiga Front default theme: $TAIGA_DEFAULT_THEME"
+if [ -n "${TAIGA_DEFAULT_THEME}" ]; then
+  log "Updating Taiga Front default theme: ${TAIGA_DEFAULT_THEME}"
   sed -i \
-    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"$TAIGA_DEFAULT_THEME\"|g" \
+    -e "s|\"defaultTheme\": \".*\"|\"defaultTheme\": \"${TAIGA_DEFAULT_THEME}\"|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PUBLIC_REGISTER_ENABLED" ]; then
-  log "Updating Taiga Front public registration status: $TAIGA_PUBLIC_REGISTER_ENABLED"
+if [ -n "${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}" ]; then
+  log "Updating Taiga Front public registration status: ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED}"
   sed -i \
-    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": $TAIGA_PUBLIC_REGISTER_ENABLED,|g" \
+    -e "s|\"publicRegisterEnabled\": .*,|\"publicRegisterEnabled\": ${TAIGA_PUBLIC_REGISTER_ENABLED:-$PUBLIC_REGISTER_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_FEEDBACK_ENABLED" ]; then
-  log "Updating Taiga Front feedback status: $TAIGA_FEEDBACK_ENABLED"
+if [ -n "${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}" ]; then
+  log "Updating Taiga Front feedback status: ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED}"
   sed -i \
-    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": $TAIGA_FEEDBACK_ENABLED,|g" \
+    -e "s|\"feedbackEnabled\": .*,|\"feedbackEnabled\": ${TAIGA_FEEDBACK_ENABLED:-$FEEDBACK_ENABLED},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_SUPPORT_URL" ]; then
-  log "Updating Taiga Front support URL: $TAIGA_SUPPORT_URL"
+if [ -n "${TAIGA_SUPPORT_URL}" ]; then
+  log "Updating Taiga Front support URL: ${TAIGA_SUPPORT_URL}"
   sed -i \
-    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"$TAIGA_SUPPORT_URL\",|g" \
+    -e "s|\"supportUrl\": .*,|\"supportUrl\": \"${TAIGA_SUPPORT_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front support URL"
@@ -129,10 +129,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_PRIVACY_POLICY_URL" ]; then
-  log "Updating Taiga Front privacy policy URL: $TAIGA_PRIVACY_POLICY_URL"
+if [ -n "${TAIGA_PRIVACY_POLICY_URL}" ]; then
+  log "Updating Taiga Front privacy policy URL: ${TAIGA_PRIVACY_POLICY_URL}"
   sed -i \
-    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"$TAIGA_PRIVACY_POLICY_URL\",|g" \
+    -e "s|\"privacyPolicyUrl\": .*,|\"privacyPolicyUrl\": \"${TAIGA_PRIVACY_POLICY_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front privacy policy URL"
@@ -141,10 +141,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_TOS_URL" ]; then
-  log "Updating Taiga Front terms of services URL: $TAIGA_TOS_URL"
+if [ -n "${TAIGA_TOS_URL}" ]; then
+  log "Updating Taiga Front terms of services URL: ${TAIGA_TOS_URL}"
   sed -i \
-    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"$TAIGA_TOS_URL\",|g" \
+    -e "s|\"termsOfServiceUrl\": .*,|\"termsOfServiceUrl\": \"${TAIGA_TOS_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front terms of services URL"
@@ -153,10 +153,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GDPR_URL" ]; then
-  log "Updating Taiga Front GDPR compliance URL: $TAIGA_GDPR_URL"
+if [ -n "${TAIGA_GDPR_URL}" ]; then
+  log "Updating Taiga Front GDPR compliance URL: ${TAIGA_GDPR_URL}"
   sed -i \
-    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"$TAIGA_GDPR_URL\",|g" \
+    -e "s|\"GDPRUrl\": .*,|\"GDPRUrl\": \"${TAIGA_GDPR_URL}\",|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR compliance URL"
@@ -165,10 +165,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_MAX_UPLOAD_SIZE" ]; then
-  log "Updating Taiga Front max upload file size: $TAIGA_MAX_UPLOAD_SIZE"
+if [ -n "${TAIGA_MAX_UPLOAD_SIZE}" ]; then
+  log "Updating Taiga Front max upload file size: ${TAIGA_MAX_UPLOAD_SIZE}"
   sed -i \
-    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": $TAIGA_MAX_UPLOAD_SIZE,|g" \
+    -e "s|\"maxUploadFileSize\": .*,|\"maxUploadFileSize\": ${TAIGA_MAX_UPLOAD_SIZE},|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front GDPR URL"
@@ -177,10 +177,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_CONTRIB_PLUGINS" ]; then
-  log "Updating Taiga Front contribution plugins list: $TAIGA_CONTRIB_PLUGINS"
+if [ -n "${TAIGA_CONTRIB_PLUGINS}" ]; then
+  log "Updating Taiga Front contribution plugins list: ${TAIGA_CONTRIB_PLUGINS}"
   plugins_list=
-  for plugin in $TAIGA_CONTRIB_PLUGINS ; do
+  for plugin in ${TAIGA_CONTRIB_PLUGINS} ; do
     plugins_list="$plugins_list\"/plugins/$plugin/$plugin.json\", ";
   done
   sed -i \
@@ -193,10 +193,10 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTERS" ]; then
-  log "Updating Taiga Front importers list: $TAIGA_IMPORTERS"
+if [ -n "${TAIGA_IMPORTERS}" ]; then
+  log "Updating Taiga Front importers list: ${TAIGA_IMPORTERS}"
   importers_list=
-  for importer in $TAIGA_IMPORTERS ; do
+  for importer in ${TAIGA_IMPORTERS} ; do
     importers_list="$importers_list \"$importer\",";
   done
   sed -i \
@@ -209,45 +209,45 @@ else
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_GITHUB_ENABLED" ]; then
-  log "Updating Taiga Front GitHub importer status: $TAIGA_IMPORTER_GITHUB_ENABLED"
+if [ -n "${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}" ]; then
+  log "Updating Taiga Front GitHub importer status: ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER}"
   sed -i \
-    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": $TAIGA_IMPORTER_GITHUB_ENABLED,|g" \
+    -e "s|\"enableGithubImporter\": .*,|\"enableGithubImporter\": ${TAIGA_IMPORTER_GITHUB_ENABLED:-$ENABLE_GITHUB_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_JIRA_ENABLED" ]; then
-  log "Updating Taiga Front Jira importer status: $TAIGA_IMPORTER_JIRA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}" ]; then
+  log "Updating Taiga Front Jira importer status: ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER}"
   sed -i \
-    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": $TAIGA_IMPORTER_JIRA_ENABLED,|g" \
+    -e "s|\"enableJiraImporter\": .*,|\"enableJiraImporter\": ${TAIGA_IMPORTER_JIRA_ENABLED:-$ENABLE_JIRA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_TRELLO_ENABLED" ]; then
-  log "Updating Taiga Front Trello importer status: $TAIGA_IMPORTER_TRELLO_ENABLED"
+if [ -n "${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}" ]; then
+  log "Updating Taiga Front Trello importer status: ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER}"
   sed -i \
-    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": $TAIGA_IMPORTER_TRELLO_ENABLED,|g" \
+    -e "s|\"enableTrelloImporter\": .*,|\"enableTrelloImporter\": ${TAIGA_IMPORTER_TRELLO_ENABLED:-$ENABLE_TRELLO_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_IMPORTER_ASANA_ENABLED" ]; then
-  log "Updating Taiga Front Asana importer status: $TAIGA_IMPORTER_ASANA_ENABLED"
+if [ -n "${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}" ]; then
+  log "Updating Taiga Front Asana importer status: ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER}"
   sed -i \
-    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": $TAIGA_IMPORTER_ASANA_ENABLED,|g" \
+    -e "s|\"enableAsanaImporter\": .*,|\"enableAsanaImporter\": ${TAIGA_IMPORTER_ASANA_ENABLED:-$ENABLE_ASANA_IMPORTER},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_GRAVATAR" ]; then
-  log "Updating Taiga Front Gravatar status: $TAIGA_GRAVATAR"
+if [ -n "${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}" ]; then
+  log "Updating Taiga Front Gravatar status: ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR}"
   sed -i \
-    -e "s|\"gravatar\": .*,|\"gravatar\": $TAIGA_GRAVATAR,|g" \
+    -e "s|\"gravatar\": .*,|\"gravatar\": ${TAIGA_GRAVATAR:-$ENABLE_GRAVATAR},|g" \
     /taiga/conf.json
 fi
 
-if [ -n "$TAIGA_LOGIN_FORM_TYPE" ]; then
-  log "Updating Taiga Front login form type: $TAIGA_LOGIN_FORM_TYPE"
+if [ -n "${TAIGA_LOGIN_FORM_TYPE}" ]; then
+  log "Updating Taiga Front login form type: ${TAIGA_LOGIN_FORM_TYPE}"
   sed -i \
-    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"$TAIGA_LOGIN_FORM_TYPE\"|g" \
+    -e "s|\"loginFormType\": \".*\"|\"loginFormType\": \"${TAIGA_LOGIN_FORM_TYPE}\"|g" \
     /taiga/conf.json
 else
   log "Reset Taiga Front login form type"
@@ -265,8 +265,8 @@ if [ -d /etc/nginx/conf.d/ ]; then
   rm -f /etc/nginx/conf.d/*.conf
 fi
 
-if [ "$TAIGA_SSL" = "True" ]; then
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+if [ "${TAIGA_SSL}" = "True" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events-ssl.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -276,7 +276,7 @@ if [ "$TAIGA_SSL" = "True" ]; then
       /etc/nginx/conf.d/taiga.conf
   fi
 else
-  if [ -n "$TAIGA_EVENTS_ENABLED" ]; then
+  if [ -n "${TAIGA_EVENTS_ENABLED:-$EVENTS_ENABLED}" ]; then
     ln -s \
       /etc/nginx/sites-available/taiga-events.conf \
       /etc/nginx/conf.d/taiga.conf
@@ -288,7 +288,7 @@ else
 fi
 
 # Update proxy pass if backend served with SSL
-if [ "$TAIGA_BACKEND_SSL" = "True" ]; then
+if [ "${TAIGA_BACKEND_SSL}" = "True" ]; then
   sed -i \
     -e "s|http://|https://|g" \
     /etc/nginx/snippets/api.conf
@@ -299,18 +299,18 @@ else
 fi
 
 # Look to see if we should update the backend connection
-if [ -n "$TAIGA_BACK_HOST" ]; then
-  log "Updating Taiga Back connection: $TAIGA_BACK_HOST"
+if [ -n "${TAIGA_BACK_HOST}" ]; then
+  log "Updating Taiga Back connection: ${TAIGA_BACK_HOST}"
   sed -i \
-    -e "s|server .*;|server $TAIGA_BACK_HOST:$TAIGA_BACK_PORT;|g" \
+    -e "s|server .*;|server ${TAIGA_BACK_HOST}:${TAIGA_BACK_PORT:-8001};|g" \
     /etc/nginx/snippets/upstream.conf
 fi
 
 # Look to see if we should update the events connection
-if [ -n "$TAIGA_EVENTS_HOST" ]; then
-  log "Updating Taiga Events connection: $TAIGA_EVENTS_HOST"
+if [ -n "${TAIGA_EVENTS_HOST}" ]; then
+  log "Updating Taiga Events connection: ${TAIGA_EVENTS_HOST}"
   sed -i \
-    -e "s|proxy_pass http://.*/events|proxy_pass http://$TAIGA_EVENTS_HOST:$TAIGA_EVENTS_PORT/events|g" \
+    -e "s|proxy_pass http://.*/events|proxy_pass http://${TAIGA_EVENTS_HOST}:${TAIGA_EVENTS_PORT:-8888}/events|g" \
     /etc/nginx/snippets/events.conf
 fi