@trwnh @erincandescent @thisismissem @strangeparts I think the reason I found the old article was because I was using the wrong terms and ended up here: https://github.com/felx/mastodon-documentation/blob/master/Running-Mastodon/Serving_a_different_domain.md
The fact that it was on a separate page probably helped it come up in search results. I also had the weird experience of setting up mastodon through NixOS several years ago, so I wasn't using a lot of the official documentation.