puerta/internal/server/static/manifest.webmanifest

{
  "background_color": "#ffc6d7",
  "description": "Abre la puerta del Castillo de Chapultebob",
  "display": "standalone",
  "icons": [
    {
      "src": "static/icon@192.png",
      "sizes": "192x192",
      "type": "image/png"
    }
  ],
  "name": "Puerta Nidito",
  "short_name": "Puerta",
  "start_url": "/"
}