docker official builds from official repo for polymur

[tehlers320]

polymur-proxy is ideal to run in docker and the environment flags are already variables which is great. But it would be nice to have this built directly out of the official project.

[ehlerst]

FYI, I threw together a quick and dirty build set automated on dockerhub.

https://github.com/ehlerst/polymur/commit/3ef430f5f6260c5f8e461c5dba608148c29439a1 These could use a bit of work i think they containers are kinda heavy and it lazily pulls all of the binarys.

I think more of value might by the RPM builder stuff I started here: https://github.com/ehlerst/polymur/commit/3484426ff05faef4b5b2a52c9745773551b0c12e

Let me know if you like the direction this is going and ill work on refining it for a PR.

[jamiealquiza]

Cool I'll check it out. I haven't fully baked what it means yet, but I was planning on coming up with some standardized Dockerization that I want to use across my repos (along with CI, etc), but any working examples are welcomed references!