Use docker image

docker/Dockerfile

@@ -0,0 +1,15 @@
+FROM ruby:2.7
+
+ENV BUNDLE_GEMFILE=/app/bundle/Gemfile
+
+WORKDIR /app/bundle
+
+ADD Gemfile .
+
+RUN bundle install
+
+RUN mkdir /app/src
+
+WORKDIR /app/src
+
+ENTRYPOINT ["bundle", "exec", "jekyll"]

go.sh

@@ -5,31 +5,28 @@ set -e
 export JEKYLL_VERSION=3.8
 
 goal_serve() {
-  docker run --rm \
-    --volume="$PWD:/usr/src/app" \
-    --volume="$PWD/vendor/bundle/gems:/usr/local/bundle" \
-    --workdir=/usr/src/app \
-    --env FORCE_POLLING=true \
-    -p 4000:4000 \
-    -p 40000:40000 \
-    -it ruby:2.7 \
-    bash -c "bundle install && bundle exec jekyll serve --drafts --livereload --livereload_port 40000 --force_polling --incremental"
+  goal_docker
+
+  docker run --rm -p 4000:4000 -p 40000:40000 -v $(pwd):/app/src jekyll-container serve\
+      --host 0.0.0.0 --drafts --livereload --livereload_port 40000 --force_polling
 }
 
 goal_build() {
-  docker run --rm \
-    --volume="$PWD:/srv/jekyll:Z" \
-    --volume="$PWD/vendor/bundle:/usr/local/bundle:Z" \
-    --env JEKYLL_ENV=production \
-    jekyll/builder:$JEKYLL_VERSION \
-    jekyll build
+  goal_docker
+  rm -rf _site
+  docker run --rm -p 4000:4000 -p 40000:40000 --env JEKYLL_ENV=production -v $(pwd):/app/src jekyll-container build
+}
+
+goal_docker() {
+  docker build -t jekyll-container docker
 }
 
 goal_help() {
   echo "usage: $0 <goal>
     available goals
     serve   -- serve the blog locally (http://localhost:4000)
     build   -- build the blog (builds static artifact for publishing)
+    docker  -- creates docker build image (tag: jekyll-container)
     "
   exit 1
 }