Add Sourcehut repo

CONTRIBUTING.md

@@ -1,23 +1,23 @@
 # Contributing
 
-I normally use [Sourcehut][1] for my projects, which is based on the
-[`git send-email`][2] workflow. I intend to make Sourcehut the primary repo once
-it’s done recoving from the DDoS attack (I’ll keep this mirror up though), so
-most work on this project currently uses Sourcehut infrastructure. The Tildegit
-repo is basically just so people can clone it.
+I set up the [Tildegit repo][1] during the [Sourcehut–Codeberg DDoS attack][2]
+because I couldn’t make the [Sourcehut repo][3] public. Now you can use either
+for drive-by commits and it should work pretty well. If you plan to be a regular
+contributor, you should also subscribe to [the mailing list][4].
 
-**There is also a [Matrix room][3] if you have questions about anything**
+There is also a [Matrix room][4] if you have questions about anything
 
-[1]: https://sourcehut.org/
-[2]: https://git-send-email.io/
-[3]: matrix:r/vtt-embed:riot.firechicken.net?action=join
+[1]: https://tildegit.org/u9000/vtt-embed
+[2]: https://web.archive.org/web/20240112173110/https://sourcehut.org/
+[3]: https://sr.ht/~u9000/vtt-embed/
+[4]: matrix:r/vtt-embed:matrix.org?action=join
 
 ## Normal contributing stuff
 
 All contributions are welomed. If you can, please try to follow the format
 below. If you can’t, just send an email to ~u9000/vtt-embed@lists.sr.ht asking
 me to pull from your remote (remember to include the URL of your remote), or
-just send an email.
+create a pull request on the Tildegit mirror.
 
 1. `git pull`
 2. contribute
@@ -28,9 +28,4 @@ just send an email.
 
 ## Issues
 
-To make the future transition easier,
-[issues are already hosted on Sourcehut][4]. Before raising an issue, please
-[email the mailing list][5] first to discuss.
-
-[5]: https://todo.sr.ht/~u9000/vtt-embed
-[6]: https://lists.sr.ht/~u9000/vtt-embed
+Before raising an issue, please email the mailing list first to discuss.