Developer question: If you build a minimal ActivityPub server for development purposes, do you have to run it on a registered domain with an SSL certificate for it to be able to connect to anything else (like a big Mastodon instance)?
Or is running it on some kind of dynDNS or ngrok type service (so it has a static domain name) enough just to test things out?
(Boosts for reach gratefully received 🙏)
