con.png" rel="shortcut icon" type="image/png"/>

    <title>example</title>
    <link href="manifest.json" rel="manifest">
</head>
<body>
<!-- This script installs service_worker.js to provide PWA functionality to
     application. For more information, see:
     https://developers.google.com/web/fundamentals/primers/service-workers -->
<script>
    if ('serviceWorker' in navigator) {
      window.addEventListener('load', function () {
        navigator.serviceWorker.register('flutter_service_worker.js');
 