Get config from environment variables instead of config files

[george-ayris]

This is probably a more pythonic way of doing it

[george-ayris]

First read from environment variables and fall back to config file if the environment variable aren't set?

[domgreen]

seems legit

[george-ayris]

How much sense does this make for collections (i.e. the PROJECTS and PACKAGE_SOURCES) and dictionaries (i.e. `OCTOPUS_HEADERS) to be stored in environment variables? Because you're probably going to have to serialise them to JSON anyway to store them as a string, which means they'll be a pain to set manually.

A single secret like the x-octopus-apikey seems to make more sense to me?

[penderi]

I wonder if either is valid. There's arguments both ways over what takes precedence. Is there prior art ??
Perhaps, env variables only for things than can change between environments?
I also wonder in an Octopus world why use env variables?