Note that Netlify provides GitLab integration and doesnt have this bug.

@ayufan OK, addressed and ready for review again.

I prefer this way of doing things because we may add a handler for the /something/else in the future. Pre-emptively returning a 404 here will break...

It can, and this allows us to remove the matchHost variable entirely 👍

Yes - they will be passed to the regular pages daemon, which will fail to find a project - and return 404 as a consequence.

Generally, there's quite an amount of changes. I just have two questions more, than something to complain. Please let me know what do you think @ni...

Does it mean that any request that is group.gitlab.io/-/project/-/something/else will be processed as the regular pages request?

Can it just be: len(matchHost)-len(a.suffix)?

OK, I'll do group.gitlab.io/-/subgroup/project/-/jobs/1/artifacts/index.html - it should be a small, quick change :)