Comment by Arrowmaster

I don't have any specific recommendations other than do as little in your CI/CD as possible, instead do as much as possible in your build system or scripts that get called by CI/CD. This way you can migrate with less work or run locally when you want.

This one is really pleasant: https://woodpecker-ci.org/

Hopefully a good spot to plug my own project, preloop, which is a drop-in replacement of Github actions(both the runners and control plane) that runs locally or self-hosted in isoalted microvms, and supports debug-on-failure. You can also push to the server, run CI and then optionally create a draft PR. Not quite production-ready yet(for the self-hosted part), but the local part works well. We implement the official runner protocol 100% unlike act/gitea/forgejo, so your workflows are more likely to work out of the box with preloop(forgejo has the closest compatibility with Github Actions though so it's a good off-Github option) and we use microvms so no DinD issues. I'm working on getting the official runner vm image up to reduce any environment incompatibilities. Feel free to try it out: https://github.com/preloopdev/preloop

For a forgejo host, check codefloe.com if what you need is a place to host personal projects or smaller teams. It’s been rock solid and it is now the default choice for anything outside of work I’ll do.