{  
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    {
      "src": "/images/icons/57.png",
      "type": "image/png",
      "sizes": "57x57"
    },
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      "type": "image/png",
      "sizes": "72x72"
    },
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      "type": "image/png",
      "sizes": "114x114"
    },
    {
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      "type": "image/png",
      "sizes": "144x144"
    },
    {
      "src": "/images/icons/192.png",
      "type": "image/png",
      "sizes": "192x192"
    }
  ],
  "start_url": "/?source=pwa",
  "background_color": "#ffffff",
  "display": "standalone",
  "orientation": "any",
  "theme_color": "#4fa800"
}