forgejo currently doesn't support port redirection, so it's necessary for services to use their normal ports the old file is kept for local usage
It's not mirrored by code.forgejo.org.
It's not possible to use v4, as action-setup doesn't have v4 tag, and unlike GitHub Actions, Forgejo Actions doesn't try to automatically convert refs like v4 into full tags like v4.0.0.
Fixes #34.