manifest.json

{
 "short_name": "User Mgmt.",
 "name": "User Management",
 "icons": [
   {
     "src": "favicon.ico",
     "sizes": "64x64 32x32 24x24 16x16",
     "type": "image/x-icon"
   },
   {
     "src": "logo192.png",
     "type": "image/png",
     "sizes": "192x192"
   },
   {
     "src": "logo512.png",
     "type": "image/png",
     "sizes": "512x512"
   }
 ],
 "start_url": ".",
 "display": "standalone",
 "theme_color": "#aaffaa",
 "background_color": "#ffffff"
}