The idea of making it a community is interesting, but you have to find a way to offer something developers really need, because it’s difficult to make people passionate about a new “social” in this era.
Idk what it could be, maybe a way to match devs using their skills? So anyone can follow the progress/projects of devs in the same stack?
Then you probably need something that catches attention quickly, like an interactive map with the locations of every dev. That’s something that has been working lately (world maps showing different things on them). I would love to be on there because I know that maybe someone will search for devs in their country and so on. Interactive ways to find something, that’s the idea.
Anyway, you look passionate about it, so the only advice I can give you is to keep focusing on it and try everything you think makes sense in the direction of growing your user base.
Good luck and keep going!