On Alpine Linux it’s quite simple. Each service of sourcehut is already packaged for Alpine (SourceHut’s author Drew Devault is also an Alpine contributor.) so all that’s needed is a few `apk add` and basic configuration. And a PostgreSQL database. I never finished setting up the CI service though because it requires building your own VM images to run scripts in and that was more work than I was willing to do at the time. But since it’s all modular you can have a working instance without the CI service.