manifest.json

{
  "name": "Full title of website, app, or product",
  "short_name": "Short name",
  "icons": [
    {
      "src": "launcher-icon-0-75x.png",
      "sizes": "36x36",
      "type": "image/png",
      "density": "0.75"
    },
    {
      "src": "launcher-icon-1x.png",
      "sizes": "48x48",
      "type": "image/png",
      "density": "1.0"
    },
    {
      "src": "launcher-icon-1-5x.png",
      "sizes": "72x72",
      "type": "image/png",
      "density": "1.5"
    },
    {
      "src": "launcher-icon-2x.png",
      "sizes": "96x96",
      "type": "image/png",
      "density": "2.0"
    },
    {
      "src": "launcher-icon-3x.png",
      "sizes": "144x144",
      "type": "image/png",
      "density": "3.0"
    },
    {
      "src": "launcher-icon-4x.png",
      "sizes": "192x192",
      "type": "image/png",
      "density": "4.0"
    }
  ],
  "scope": "/app/",
  "start_url": "/app/index.html",
  "display": "standalone"
},
"developer": {
    "name": "Developer Name",
    "url": "http://yoursite.com"
  },
  "default_locale": "en"
}