schmonz.com is a Fediverse instance that uses the ActivityPub protocol. In other words, users at this host can communicate with people that use software like Mastodon, Pleroma, Friendica, etc. all around the world.
This server runs the snac software and there is no automatic sign-up process.
That shell snippet gets the latest time for each file from Git and sets the file mtime to that. I with ikiwiki did this. It's fast enough to do every time.