Add Docker Enviroment Variables Support

[Middlepepper]

This is more a Enhancement request but would it be worth while to setup Docker Variable pass-through?

I'm not sure how to do this so it will play nice with local variable while still letting someone manually edit the config.py

But I've done something similar to below, in another project.

• i.e ACM api key = os.getenv('ACM api key') or
• ACM announce_url = os.getenv('ACM announce_url')

[Audionut]

I don't do docker. Any docker modifications other than what is strictly necessary to make builds, needs to be submitted through a PR.