docs: Update README

README.md

@@ -69,6 +69,10 @@ channel = 000000000
 muc = "channel@muc.server.example"
 ```
 
+In order for the bridge to work, it needs to have an affiliation of `owner` before joining.
+The virtual users that follow will be automatically added to the room with an affiliation
+of `member`.
+
 ## License
 
 See `./LICENSE`