Add documentation URL

Author: zdevaty

metadata.json

@@ -14,10 +14,11 @@
   ],
   "apiUrl": "v1",
   "apiSpecificationPath": "/version/openapi.json",
+  "documentationUrl": "https://doc.eliona.io/collection/v/eliona-english/eliona-apps/apps/hailo",
   "useEnvironment": [
     "CONNECTION_STRING",
     "INIT_CONNECTION_STRING",
     "API_ENDPOINT",
     "API_TOKEN"
   ]
-}
+}