Inform users we intentionally shut down cgit instead of 500

[nikromen]

in past 2 days we got 2 notifications on matrix about broken cgit. Since https://copr-dist-git.fedorainfracloud.org/cgit throws 500, users don't know it's intentional. Also this is not the first time we have problems with cgit and we shit it down, so this can be useful in the future

[FrostyX]

Agree. If we decide to keep cgit long-term (I still keep joking about forgejo), we should prepare a simple static page saying that the server is down intentionally, and serve it when we do that chmod -x workaround. Or somehow else tweak the error message.

[FrostyX]

In the meantime, maybe we can use frontend warning that we typically use for announcing outages?

[praiskup]

(I still keep joking about forgeje)

Jokes aside; driving our own "read-only" instance wouldn't make sense, but having a namespace in the Fedora official forge doesn't sound weird at all to me (of course, considering infra folks are OK to hold Copr's traffic at that point in time).

In the meantime, maybe we can use frontend warning that we typically use for announcing outages?

Sounds good.

Is this a duplicate to #3591?

[FrostyX]

Fixed by https://pagure.io/fedora-infra/ansible/c/c06de2f370f116dd57f433fecd287b57bce60de0