manifest.json

{
  "name": "Gia Hùng",
  "short_name": "Gia Hùng",
  "start_url": "index.html",
  "display": "standalone",
  "background_color": "#fdfdfd",
  "theme_color": "#ed143d",
  "orientation": "portrait-primary",
  "icons": [
    {
      "src": "assets/images/H16.png",
      "type": "image/png", "sizes": "16x16"
    },
    {
      "src": "assets/images/H24.png",
      "type": "image/png", "sizes": "24x24"
    },
    {
      "src": "assets/images/H32.png",
      "type": "image/png","sizes": "32x32"
    },
    {
      "src": "assets/images/H64.png",
      "type": "image/png", "sizes": "64x64"
    },
    {
      "src": "assets/images/H128.png",
      "type": "image/png", "sizes": "128x128"
    },
    {
      "src": "assets/images/H256.png",
      "type": "image/png", "sizes": "256x256"
    },
    {
      "src": "assets/images/H512.png",
      "type": "image/png", "sizes": "512x512"
    }
  ]
}