feat: Enforce single team when self-hosted (#1954)

* fix: Enforce single team when self hosting

* test: positive case

* refactor

* fix: Visible error message on login screen for max teams scenario

* Update Notices.js

* lint

app.json

@@ -55,7 +55,7 @@
       "description": "",
       "required": false
     },
-    "GOOGLE_ALLOWED_DOMAINS": {
+    "ALLOWED_DOMAINS": {
       "description": "Comma separated list of domains to be allowed (optional). If not set, all Google apps domains are allowed by default",
       "required": false
     },
@@ -148,4 +148,4 @@
       "required": false
     }
   }
-}
+}