🐳 Dockerize!

for easier setup, testing, and rapid deployment
could be improved by having mvn dependencies pre-downloaded before CMD
and only downloading when mvn dependencies change since last docker
image cache

Author: mikesmullin

Dockerfile

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+FROM anapsix/alpine-java:8_jdk_unlimited
+
+WORKDIR /home/app
+
+# install dumb-init; helps dockerized java handle signals properly
+# using ADD avoids installing openssl dependency
+ADD https://github.com/Yelp/dumb-init/releases/download/v1.1.3/dumb-init_1.1.3_amd64 /usr/bin/dumb-init
+RUN chmod +x /usr/bin/dumb-init
+ENTRYPOINT ["dumb-init", "--"]
+
+# process will run as non-root `app` user
+RUN addgroup app \
+		&& adduser -s /bin/bash -D app -G app \
+		&& chown -R app:app .
+
+# install maven
+RUN wget http://mirrors.ocf.berkeley.edu/apache/maven/maven-3/3.3.9/binaries/apache-maven-3.3.9-bin.tar.gz \
+		&& tar zxvf apache-maven-3.3.9-bin.tar.gz \
+		&& rm -f apache-maven-3.3.9-bin.tar.gz 
+
+COPY . ./
+
+USER app
+
+EXPOSE 8080
+
+# start with spring boot
+CMD apache-maven-3.3.9/bin/mvn spring-boot:run -DgitlabUrl="$GITLAB_URL"