Which version it started being beta in is quite irrelevant here.

And mention that an empty string can be used to configure
Conduit purely with env vars.

Mention the need for a config.

...github.com repo, to relieve some pressure from git.koesters.xyz.

Update 'README.md'

Update README, fix CI

Co-authored-by: timokoesters <timo@koesters.xyz>
Reviewed-on: https://git.koesters.xyz/timo/conduit/pulls/148