Document setting "listen" via environment variable. #17
Description
Is your feature request related to a problem? Please describe.
I'd like to be able to change the listen setting when convos is running in a container. I initially didn't think this was possible, but realized that the MOJO_LISTEN environment variable can be used for this.
Describe the solution you'd like
Documenting setting this, possibly in the docker section of the documentation. Although, I guess it could be useful even when not running it in a container. It might also be worthwhile to document listening via a unix socket. http+unix://%2Ftmp%2Fmyapp.sock is what it uses an example when you run it via command-line, but it's not mentioned in the docs.
Additional context
The reason I want to do this is to make it listen on a unix socket mounted in a docker volume, so I can mount that in the reverse-proxy container. I'm using networking options that make sharing networks between these containers not workable, so I have to do it in a different way.