Improvements Config/Deployment

I'm thinking about providing configs for Docker Swarm. We can easily deploy with `docker stack` command simply using Docker Compose files, but there are some specific things like using Docker Secrets for storing sensitive data that would be best to keep in separate files probably.

I have a Python package that will help with this and could replace django-environ:

- https://github.com/douglasmiranda/gconfigs

And if we need an "automatic Docker Secrets to Environment Variables":

- https://github.com/douglasmiranda/dockerfiles/tree/master/experiments/docker-secrets-as-env

And the easiest way to provide an HTTPS config would be with Caddy, I have something ready for this too:

- https://github.com/douglasmiranda/dockerfiles/tree/master/caddy

Related: #2 #4