{
    "name": "Echo App",
    "short_name": "Echo",
     "start_url": ".",
     "display": "standalone",
    "background_color": "#ffffff",
    "theme_color": "#0175C2",
    "description": "GLC Echo Application",
     "orientation": "portrait-primary",
     "prefer_related_applications": false,
    "gcm_sender_id": "103953800507",
     "icons": [
          {
               "src": "icons/Icon-192.png",
               "sizes": "192x192",
               "type": "image/png"
          },
          {
               "src": "icons/Icon-512.png",
               "sizes": "512x512",
               "type": "image/png"
          },
          {
               "src": "icons/Icon-maskable-192.png",
               "sizes": "192x192",
               "type": "image/png",
               "purpose": "maskable"
          },
          {
               "src": "icons/Icon-maskable-512.png",
               "sizes": "512x512",
               "type": "image/png",
               "purpose": "maskable"
          }
     ]

}