docker: massive changes.

Addressed to #534

Author: php-coder

docker/Dockerfile

@@ -3,6 +3,50 @@
 # https://github.com/docker-library/buildpack-deps/blob/a0a59c61102e8b079d568db69368fb89421f75f2/jessie/curl/Dockerfile
 # https://github.com/docker-library/openjdk/blob/445f8b8d18d7c61e2ae7fda76d8883b5d51ae0a5/8-jre/Dockerfile
 FROM openjdk:8u121-jre
+
+# Informs Docker that the container listens on the specified network ports at runtime.
+# See also: https://docs.docker.com/engine/reference/builder/#expose
 EXPOSE 8080
-COPY mystamps.war /tmp
-CMD [ "java", "-Dserver.address=0.0.0.0", "-jar", "/tmp/mystamps.war" ]
+
+# Sets active Spring profile. Possible values are: test, prod and travis.
+# See also: https://docs.docker.com/engine/reference/builder/#env
+ENV SPRING_PROFILES_ACTIVE=test
+
+# Creates base directories and unprivileged user.
+# See also: https://docs.docker.com/engine/reference/builder/#run
+RUN mkdir /data \
+ && useradd mystamps --home-dir /data/mystamps --create-home --comment 'MyStamps' \
+ && mkdir /data/uploads /data/heap-dumps \
+ && chown mystamps:mystamps /data/uploads /data/heap-dumps
+
+# Creates mount points and marks them as holding externally mounted volumes from native host.
+# See also: https://docs.docker.com/engine/reference/builder/#volume
+VOLUME /data/uploads /data/heap-dumps
+
+# Sets the user name to use when running the image and for any subsequent RUN, CMD and ENTRYPOINT instructions.
+# See also: https://docs.docker.com/engine/reference/builder/#user
+USER mystamps
+
+# Sets the working directory for any subsequent RUN, CMD, ENTRYPOINT, COPY and ADD instructions.
+# See also: https://docs.docker.com/engine/reference/builder/#workdir
+WORKDIR /data/mystamps
+
+# Copies mystamps.war into destination directory. File is created with a UID and GID of 0.
+# See also: https://docs.docker.com/engine/reference/builder/#copy
+COPY mystamps.war /data/mystamps
+
+# Sets the command to be executed during container startup.
+# See also: https://docs.docker.com/engine/reference/builder/#cmd
+CMD [ "java" \
+	, "-XX:+HeapDumpOnOutOfMemoryError" \
+	, "-XX:HeapDumpPath=/data/heap-dumps" \
+	, "-XX:+UseCompressedOops" \
+	, "-Dsun.rmi.dgc.client.gcInterval=86400000" \
+	, "-Dsun.rmi.dgc.server.gcInterval=86400000" \
+	, "-Djava.security.egd=file:/dev/./urandom" \
+	, "-Xmx128m" \
+	, "-Xss256k" \
+	, "-Dserver.address=0.0.0.0" \
+	, "-jar" \
+	, "mystamps.war" \
+]

docker/Makefile

@@ -1,6 +1,18 @@
-build-image:
+build:
 	ln -v ../target/mystamps.war mystamps.war && \
 	docker build --tag mystamps:0.3.0 .; \
 	rm -fv mystamps.war
 
-.PHONY: build-image
+start:
+	docker run --name mystamps --publish 8080:8080 --detach mystamps:0.3.0
+
+stop:
+	docker stop mystamps
+
+remove:
+	docker rm mystamps
+
+remove-completely:
+	docker rm -v mystamps
+
+.PHONY: build start stop remove remove-completely