{
          "name": "GMC",
          "short_name": "GMC",
          "scope":"/",
          "icons": [{
              "src": "/img/logo/128x128-min.png",
              "sizes": "128x128",
              "type": "image/png"
            }, {
              "src": "/img/logo/256x256-min.png",
              "sizes": "256x256",
              "type": "image/png"
            }, {
              "src": "/img/logo/512x512-min.png",
              "sizes": "512x512",
              "type": "image/png"
            }],
          "start_url": "/",
          "display": "standalone",
          "background_color": "#e67e22" ,
          "theme_color": "#2980b9"
        }