[code] made changes to manifest.json, updated a few parameters for URL and start states, alongside orientation property.

manifest.json

@@ -8,10 +8,11 @@
       "sizes": "512x512"
     }
   ],
-  "id": "/?source=pwa",
-  "start_url": "/?source=pwa",
+  "id": "/",
+  "start_url": "/",
   "background_color": "#000000",
   "display": "standalone",
+  "orientation": "natural",
   "scope": "/",
   "theme_color": "#000000"
 }