Automate docker builds

[maxnth]

Docker builds for dev, staging, master and releases should be automated and pushed to the uniwuezpd Dockerhub

[bertsky]

Note: I have recently updated my own Larex Dockerization to use the new tomcat base image as well, but for CI you'd still need a host system that compiles the app (i.e. has maven installed). In my previous version I included compilation in the image itself (by using ubuntu base image). Using Ubuntu as base for a CI would not be a bad choice either IMHO.

But since you also seem have an independent mechanism, which somehow feeds to http://artifactory-ls6.informatik.uni-wuerzburg.de/artifactory/libs-snapshot/de/uniwue (automatically I assume), it would probably be easier to generalize that for the dev/staging/master distinction, and just wget it from there (as you already do in https://github.com/maxnth/LAREX_Docker).