File: manifest.webmanifest

{
  "lang": "it",
  "dir": "ltr",
  "name": "App name",
  "description": "Your info",
  "manifest_version": 5,
  "short_name": "Short description",
  "icons": [
    {
        "src": "icons/icon64.png",
        "sizes": "64x64",
        "type": "image/png"
    },
    {
        "src": "icons/icon128.png",
        "sizes": "128x128",
        "type": "image/png"
    },
    {
        "src": "icons/icon192.png",
        "sizes": "192x1192",
        "type": "image/png"
    },
    {
        "src": "icons/icon256.png",
        "sizes": "256x256",
        "type": "image/png"
    },
    {
        "src": "icons/icon384.png",
        "sizes": "384x384",
        "type": "image/png"
    },
    {
        "src": "icons/icon512.png",
        "sizes": "512x512",
        "type": "image/png"
    }
  ],
  "scope": "/",
  "start_url": "http://your_site/your_app",
  "display": "fullscreen",
  "theme_color": "aliceblue",
  "background_color": "white"
}