Migrated the website back to a server I control so I can set the Content-Type header properly on ActivityPub objects. And it looks like that was enough for Mastodon to be able to pull up my profile!

So that's a nice start. I guess past this point it's a matter of:

• Adding some of the missing metadata to make the profile look nice, and...
• Building a separate daemon to actually handle ActivityPub follows and broadcasts. I assume I can have that daemon just periodically check my outbox for new posts and broadcast them to followers.

But the static site part of this has all been pretty straightforward so far, which has been nice!