manifest.webmanifest

{
  "name": "MyApplication",
  "short_name": "MyApp",
  "description": "MyApplication description",
  "start_url": "/?utm_source=web_app_manifest",
  "display": "standalone",
  "theme_color": "#000000",
  "background_color": "#ffffff",
  "icons": [
    {
      "src": "images/manifest/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "images/manifest/icon-192x192-maskable.png",
      "sizes": "192x192",
      "type": "image/png",
      "purpose": "maskable"
    },
    {
      "src": "images/manifest/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    },
    {
      "src": "images/manifest/icon-512x512-maskable.png",
      "sizes": "512x512",
      "type": "image/png",
      "purpose": "maskable"
    }
  ]
}