Current readme on their github:
I know it's hard to resist, but please wait a little longer before you dive deep into the current codebase or try to set up self-hosting. I'm aware the current stack isn't very lightweight. In the next update, self-hosting should be straightforward, with a small set of services: Fluxer Server (TypeScript) using SQLite for persistence, Gateway (Erlang), and optionally LiveKit for voice and video.