index.html

<!DOCTYPE html>
<html>
<head>
  <title></title>
  <link rel="manifest" href="manifest.webmanifest">
<!--   <meta name="viewport" content="width=device-width, initial-scale=1" /> -->
  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
  <meta name="theme-color" content="#ffffff">
</head>
<body style="margin: 0">
  <iframe id="inlineFrameExample"
    title="Inline Frame Example"
    width="100%"
    height="1000px"
    frameBorder="0"
    src="https://script.google.com/macros/s/AKfycbwYxPzRG_8bXO1URVBmMr_B_leXVoAoBGMc6mPFAqS6g_KSH0HWMcJ-fIaGc5_pvF0h/exec">
  </iframe>
  
  <script>
    if('serviceWorker' in navigator) {
      navigator.serviceWorker.register('/sw.js')
        .then(function() { console.log("Service worker registered"); });
    }
  </script>

</body>
</html>