readme: Link to Zulip for discussion

README.md

@@ -33,6 +33,10 @@ Or see `./test/flake.nix`
 
 The `dataDir` of these services tend to take *relative* paths, which are usually relative to the project root. As such, when you run these services using `nix run`, their data files are created relative to whichever directory you are in. If you want these data files to always reside relative to the project directory, instead of using `nix run` consider wrapping the process-compose packages in script, via either [mission-control](https://flakular.in/mission-control/) module or a [justfile](https://just.systems/). The example uses the latter.
 
+## Discussions
+
+To discuss the project, please [join our Zulip](https://nixos.zulipchat.com/#narrow/stream/414011-services-flake).
+
 ## Contributing
 
 - If you are adding a *new* service, see https://github.com/cachix/devenv/tree/main/src/modules/services for inspiration.