add a comment for why there is no access restriction

clean_node_api/clean_node_api.routing.yml

@@ -8,6 +8,7 @@ Api_v3.getNode:
   defaults: { _controller: '\Drupal\clean_node_api\Controller\Node::getNode' }
   methods:  [GET]
   requirements:
+#    there is no access restriction because this route just return public node values as GET method .
     _access: 'TRUE'
   formats:
     - json