Add Dockerfile and README.md to help development

[Stegallo]

[vinayak-mehta]

Thanks for the PR @Stegallo! I'll test it out and merge soon.

[williamjacksn]

For comparison, I made my own Dockerfile for this project here: https://github.com/williamjacksn/docker-excalibur

[Peque]

@williamjacksn I tried your image and it works pretty well. :blush:

Maybe open your own PR for inclusion? Since this PR seems to be abandoned.

[williamjacksn]

As an example, I updated my docker-excalibur project to use a custom entrypoint instead of excalibur webserver and serve with waitress instead of Flask.

https://github.com/williamjacksn/docker-excalibur

[Stegallo]

I've updated the docker file and created a docker compose to simplify starting up. The compose has also a nginx server that can be re-pointed once wsgi is implemented thanks to @williamjacksn and @Lamaun for the hints.