🔧 (pwa) add icon to shortcut

vue.config.js

@@ -16,7 +16,14 @@ module.exports = {
           name: 'Start a session',
           short_name: 'Start',
           description: 'Start a pair programming session',
-          url: '/play'
+          url: '/play',
+          icons: [
+            {
+              src: './img/icons/android-chrome-192x192.png',
+              sizes: '192x192',
+              type: 'image/png'
+            }
+          ]
         }
       ],
       icons: [