{
      "name": "PWA sample",
      "short_name": "PWA",
      "icons": [{
          "src": "./icon81x81.png",
          "sizes": "81x81",
          "type": "image/png"
        },
        {
          "src": "./icon180x180.png",
          "sizes": "180x180",
          "type": "image/png"
        },
        {
          "src": "./icon192x192.png",
          "sizes": "192x192",
          "type": "image/png"
        },
        {
          "src": "./icon512x512.png",
          "sizes": "512x512",
          "type": "image/png"
        }
      ],
     
      "theme_color": "#c0c0c0",
      "background_color": "#dcdcdc",
      "display": "standalone",
      "start_url": "./index.html"
    }