{
    "name": "NT Smart",
    "short_name": "NT Smart",
    "start_url": ".",
    "display": "standalone",
    "background_color": "#ffffff",
    "description": "A brief description of your app",
    "icons": [
      {
        "src": "icon-48x48.png",
        "type": "image/png",
        "sizes": "48x48"
      },
      {
        "src": "icon-192x192.png",
        "type": "image/png",
        "sizes": "192x192"
      },{
        "src": "icon-248x248.png",
        "type": "image/png",
        "sizes": "248x248"
      }
      
    ]
}