feat: enhance site.webmanifest in chrome (#4676)

Update site.webmanifest

web/public/site.webmanifest

@@ -5,5 +5,6 @@
     { "src": "/android-chrome-192x192.png", "sizes": "192x192", "type": "image/png" },
     { "src": "/android-chrome-512x512.png", "sizes": "512x512", "type": "image/png" }
   ],
-  "display": "standalone"
+  "display": "standalone",
+  "start_url": "/"
 }