Configure PWA for mobile browsers (#234)

Fix PWA issue for mobile phones
Fix icon loading issue
Update app/static/img/favicon/manifest.json

Co-authored-by: Ben Busby <benbusby@pm.me>

app/static/img/favicon/manifest.json

@@ -1,41 +1,44 @@
 {
- "name": "App",
+ "name": "Whoogle Search",
+ "short_name": "Whoogle",
+ "display": "fullscreen",
+ "scope": "/",
  "icons": [
   {
-   "src": "\/android-icon-36x36.png",
+   "src": "android-icon-36x36.png",
    "sizes": "36x36",
    "type": "image\/png",
    "density": "0.75"
   },
   {
-   "src": "\/android-icon-48x48.png",
+   "src": "android-icon-48x48.png",
    "sizes": "48x48",
    "type": "image\/png",
    "density": "1.0"
   },
   {
-   "src": "\/android-icon-72x72.png",
+   "src": "android-icon-72x72.png",
    "sizes": "72x72",
    "type": "image\/png",
    "density": "1.5"
   },
   {
-   "src": "\/android-icon-96x96.png",
+   "src": "android-icon-96x96.png",
    "sizes": "96x96",
    "type": "image\/png",
    "density": "2.0"
   },
   {
-   "src": "\/android-icon-144x144.png",
+   "src": "android-icon-144x144.png",
    "sizes": "144x144",
    "type": "image\/png",
    "density": "3.0"
   },
   {
-   "src": "\/android-icon-192x192.png",
+   "src": "android-icon-192x192.png",
    "sizes": "192x192",
    "type": "image\/png",
    "density": "4.0"
   }
  ]
-}
+}