Changed Dockerfile to a standalone Version, added ansible for deployment

[MaxRink]

I've changed a few things around. The Dockerfile now provides a standalone Pretalx with an nginx that handles all static files baked into the container. Basically the same concept pretix uses for their container. Ive also added my ansible playbook to start pretalx as a docker app with all dependencies

A few things still need improovements tho:

• [ ] adding documentation for an reverse proxy to terminate TLS for a production Setup
• [ ] fixing the image that is used within the docker-compose and ansible file (the images still pojnt to my build oin the docker hub as the official one isnt avaiable yet)

[rixx]

Ready to merge, I'd say, or would you like to add some changes before that?

[MaxRink]

I've just pushed a few more lines on how to add an reverse proxy to that setup. Its far from perfect, but ts better than nothing. Besides that, the functional part sould be finished

[rixx]

Feel free to open issues for what you still see as open points – that way, we can track progress even on stuff we're not going to get to right away.

[MaxRink]

Ok, sure

[MaxRink]

Yeah, ive mixed up the two notations. Should be fixed

[rixx]

Thank you, both of you!