Well, that's e-mail. Modern federated systems don't have a different server for sending and one for receiving. ActivyPub implementations are usually a single application with a database (like Pleroma) or a single app plus db/reddis/elasticsearch(optional) like Mastodon. Mastodon has official Docker containers, and it's not difficult to build one for Pleroma.
So you can make something "like e-mail" that isn't as bad as SMTP/IMAP/SPF/DKIM/etc... I've been considering hosting my own Gogs or Gitlab or one of the other locally hosted git platforms. I'd like to see something that allows pull/merge requests between them (you'd need some spam prevention of course; maybe require a message and a follow before people are allowed to push an request to your server).
This project ... doesn't seem like it does that at all. It's a desktop application .. with no real web view into your projects. I feel like it's missing a component, a service run in a docker container that you can program with your Device ID and push your public repos to for others to see.
