Implemented universal logout

roles/web-app-mastodon/config/main.yml

@@ -6,6 +6,7 @@ features:
   port-ui-desktop:    true
   oidc:               true
   central_database:   true
+  universal_logout:   true
 domains:
   canonical:
     - "microblog.{{ primary_domain }}"
@@ -30,4 +31,4 @@ docker:
       version:          latest
       name:             "mastodon-streaming"
   volumes:
-    data:               "mastodon_data"
+    data:               "mastodon_data"