manifest.json

{
    "name": "Nothing",
    "short_name": "Nothing",
    "start_url": "/",
    "display": "standalone",
    "orientation": "portrait",
    "background_color": "#fff",
    "theme_color": "#fff",
    "icons": [
      {
        "src": "/src/icon_48.png",
        "type": "image/png",
        "sizes": "48x48"
      },
      {
        "src": "/src/icon_72.png",
        "type": "image/png",
        "sizes": "72x72"
      },
      {
        "src": "/src/icon_96.png",
        "type": "image/png",
        "sizes": "96x96"
      },
      {
        "src": "/src/icon_144.png",
        "type": "image/png",
        "sizes": "144x144"
      },
      {
        "src": "/src/icon_192.png",
        "type": "image/png",
        "sizes": "192x192"
      },
      {
        "src": "/src/icon_512.png",
        "type": "image/png",
        "sizes": "512x512"
      }
    ]
  }