postegresql: https://hub.docker.com/_/postgres
docker alpine jdk8: https://github.com/anapsix/docker-alpine-java/blob/master/8/jdk/Dockerfile
wildfly+postgresql: https://blog.mikesir87.io/2015/12/creating-wildfly-docker-image-with-postgresql/
https://goldmann.pl/blog/2014/07/23/customizing-the-configuration-of-the-wildfly-docker-image/