fix: various fixes on community directory

README.md

@@ -295,6 +295,24 @@ To activate community on Hubl, add this module declaration your `config.json`:
     }
 ```
 
+#### Activate the community directory
+
+When you work with a federated application, you may want a directory for communities.
+
+You can activate it by changing the route to anything else than false. Some endpoints will also get needed:
+
+```json
+    {
+      "type": "communities",
+      "endpoints": {
+        "get": "http://server/communities/",
+        "addresses": "http://server/community-addresses/",
+        "uploads": "http://server/upload/"
+      },
+      "route": "communities"
+    }
+```
+
 ### Dashboard
 
 Dashboard includes card generation from HTML. To activate them, you need: