Just to start off, know that I have zero experience with this. I’m only looking into doing this because I’m absolutely sick and tired of centralised services (in this case Discord) turning to shit, and want to start a Discord-like/alternative federation between my friends.
Prosody seems to be the easiest to set up, and has all the available capabilities for a server that allows Discord-like functionality (text, group voicecall, streaming). Movim is the client that makes use of all that.
But I don’t have a clue how to set up a Prosody server with Podman. I’ve never done this before. I started by downloading the Prosody image through Podman, then tried running it, which prompted the creation of a container. Kept everything at the defaults and tried running it, but it didn’t work.
What do I do from here?
There are some misconceptions here, probably because your experience with the internet outside of these decentralised / federated services has taught you those.
1.) Servers are expected to be online 24x7. Clients can go offline and online as they please, but servers are always always always online. Otherwise very strange things start happening.
2.) Peer to peer stuff is generally speaking, somewhat brittle, because of the kinds of compromises it comes with.
3.) Signing up on an xmpp server managed by someone else is still not signing up to a centralised service. Its still just one node on the XMPP super network. Your friends can still sign up on some other server, and you can still talk to each other, with whatever clients you prefer.
There may still be a case to be made for installing movim on your own computers, but I’d say, go with the easy route and pick any movim instance from the link shared above.