manifest.json

{
  "short_name": "Restaurants Reviews",
  "name": "Restaurants Reviews",
  "background_color":"#F3F3F3",
  "theme_color":"#9c27b0",
  "display":"fullscreen",
  "icons": [
    {
      "src": "/icons/plate-fork-and-knife50x50.png",
      "type": "image/png",
      "sizes": "50x50"
    },
    {
      "src": "/icons/plate-fork-and-knife128x128.png",
      "type": "image/png",
      "sizes": "128x128"
    },
    {
      "src": "/icons/plate-fork-and-knife152x152.png",
      "type": "image/png",
      "sizes": "152x152"
    },
    {
      "src": "/icons/plate-fork-and-knife192x192.png",
      "type": "image/png",
      "sizes": "192x192"
    }
  ,
    {
      "src": "/icons/plate-fork-and-knife512.png",
      "type": "image/png",
      "sizes": "512x512"
    }
  ],
  "start_url": "/index.html"
}