fix(manifest): fix path for tool labs start url

Author: yarl

src/manifest_dev.json

@@ -24,7 +24,7 @@
       "type": "image/png"
     }
   ],
-  "start_url": "/#/",
+  "start_url": "/monumental/#/",
   "display": "standalone",
   "orientation": "portrait"
 }