{
    "name" : "Promise App",
    "short_name" : "promiseApp",
    "start_url": "index.html",
    "display" : "standalone",
    "background_color" : "#333",
    "theme_color" : "#ddd",
    "orientation" :"portrait-primary",
    "icons":[

  {
    "src": "images/icons/manifest-icon-192.maskable.png",
    "sizes": "192x192",
    "type": "image/png",
    "purpose": "any"
  },
  {
    "src": "images/icons/manifest-icon-192.maskable.png",
    "sizes": "192x192",
    "type": "image/png",
    "purpose": "maskable"
  },
  {
    "src": "images/icons/manifest-icon-512.maskable.png",
    "sizes": "512x512",
    "type": "image/png",
    "purpose": "any"
  },
  {
    "src": "images/icons/manifest-icon-512.maskable.png",
    "sizes": "512x512",
    "type": "image/png",
    "purpose": "maskable"
  }
    ]
}