manifest.json

{
  "short_name": "Cuckoosweepers",
  "name": "Cuckoosweepers",
  "start_url": "/",
  "display": "standalone",
  "background_color": "#ffffff",
  "theme_color": "#000000",
  "icons": [
    {
      "src": "/icon.jpg",
      "type": "image/png",
      "sizes": "192x192"
    },
    {
      "src": "/icon.jpg",
      "type": "image/png",
      "sizes": "512x512"
    }
  ],
  "scope": "/",
  "orientation": "portrait-primary",
  "description": "A fun Minesweeper-like game for all devices."
}