Docker build test suite

[BenjaFriend]

It would be really nice to have a docker file that can build on Linux with your local changes, so that you can quickly test clang compilation and unit test suites.

[BenjaFriend]

We already have https://github.com/flingengine/FlingDockerBuild that can run in something like Jenkins, but that does a fresh clone/build every time. I want something that I can run locally in the actual source repo here to test local changes before pushing them up to staging.

[florianvazelle]

Hi, I'll work on it. I think I can do something good.

[BenjaFriend]

closing this because it's really unnecessary atm