Stack Overflow is a “community site” https://www.sciencedirect.com/science/article/pii/S0164121218300517.

Is the Elixir Forum a Stack Overflow for Elixir?

It seems the Elixir Forum uses Discourse https://www.discourse.org/.

Other languages use Discourse (Rust https://users.rust-lang.org/, Kotlin https://discuss.kotlinlang.org/, see https://www.discourse.org/testimonials).

Docker uses it https://forums.docker.com/. Atom https://discuss.atom.io/