chore: Allow websockets and collaboration service to run in the same process (#2674)

.env.sample

@@ -29,8 +29,8 @@ REDIS_URL=redis://localhost:6479
 URL=http://localhost:3000
 PORT=3000
 
-# ALPHA – See [documentation](docs/SERVICES.md) on running the alpha version of
-# the collaboration server.
+# See [documentation](docs/SERVICES.md) on running a separate collaboration
+# server, for normal operation this does not need to be set.
 COLLABORATION_URL=
 
 # To support uploading of images for avatars and document attachments an