My mastodon server is up & running.
I've taken down the docker images. I'll see if I can run that code natively. I hook to it to generate tokens for a jitsi-meet server.
Now to do all of that migration stuff I've heard tell about. In the meantime, I'm still here on mastodon.social.
When I'm finished, mine will have a nice URL. It's using a clumsy-looking one that works on this server b/c SSL is picky.
The final problem wasn't #mastodon or (at least tangentially) #nginx. It was #docker.