Added Ubuntu Dockerfile and new unit test script

Makefile

@@ -11,6 +11,9 @@ post-build:
 docker-build:
 	docker build -t $(NAME):$(TAG) --rm .
 
+docker-build-ubuntu:
+	docker build -f ubuntu.dockerfile -t $(NAME):$(TAG) --rm .
+
 shell:
 	docker run -it --rm --entrypoint=$(SHELL) -p 8080:80 $(NAME):$(TAG)
 
@@ -22,4 +25,5 @@ test:
 	docker run -it --rm -p 8080:8000 -e PARSOID_DOMAIN_localhost=http://localhost/w/api.php $(NAME):$(TAG)
 
 unit-test:
-	docker run -it --rm -w "/var/lib/parsoid" $(NAME):$(TAG) npm test
+	chmod +x run-unit-tests.sh
+	./run-unit-tests.sh $(NAME):$(TAG)

run-unit-tests.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+if [[ -z $1 ]]; then
+    echo "[ERROR] Missing the image tag as arg!" >/dev/stderr
+    echo "How to use: ./run-unit-tests.sh thenets/parsoid:0.11"
+    exit 1
+fi
+
+set -x
+DOCKER_IMAGE=$1
+
+TEMP_DIR=$(mktemp -d)
+
+docker run -it --rm \
+    -w "/var/lib/parsoid" \
+    -v ${TEMP_DIR}/npm_logs:/root/.npm/_logs/ \
+    ${DOCKER_IMAGE} \
+    npm test
+
+set +x
+
+echo ""
+echo "[DONE] Log files at: ${TEMP_DIR}"
+

ubuntu.dockerfile

@@ -0,0 +1,40 @@
+FROM node:13
+
+LABEL maintainer="[email protected]"
+
+ENV PARSOID_HOME=/var/lib/parsoid \
+    PARSOID_USER=parsoid \
+    # PARSOID_VERSION [v0.8.1, v0.9.0, v0.10.0, v0.11.0, master]
+    PARSOID_VERSION=v0.11.0
+
+COPY run-parsoid.sh /run-parsoid.sh
+
+# Parsoid setup
+RUN set -x \
+    # Install required packages
+    && apt-get update \
+    && apt-get install -y python git tar bash make
+
+RUN set -x \
+    # Add user
+    && useradd -M -u 1001 -s /bin/bash ${PARSOID_USER} \
+    # Set permissions
+    && chmod -v +x /run-parsoid.sh \
+    # Core
+    && mkdir -p ${PARSOID_HOME} \
+    && git clone \
+        --branch ${PARSOID_VERSION} \
+        --single-branch \
+        --depth 1 \
+        --quiet \
+        https://gerrit.wikimedia.org/r/p/mediawiki/services/parsoid \
+        ${PARSOID_HOME}
+
+RUN set -x \
+    && cd ${PARSOID_HOME} \
+    && npm install
+
+EXPOSE 8000
+EXPOSE 8001
+
+CMD ["/run-parsoid.sh"]