Aditsyal/customize.html Secret

## customize.html
<html>
   <head>
      <!-- ... -->
      <script src="flutter.js" defer></script>
   </head>
   <body>
      <div id="loading"></div>
      <script>
         window.addEventListener('load', function(ev) {
           var loading = document.querySelector('#loading');
           loading.textContent = "Loading entrypoint...";
           _flutter.loader.loadEntrypoint({
             serviceWorker: {
               serviceWorkerVersion: serviceWorkerVersion,
             }
           }).then(function(engineInitializer) {
             loading.textContent = "Initializing engine...";
             return engineInitializer.initializeEngine();
           }).then(function(appRunner) {
             loading.textContent = "Running app...";
             return appRunner.runApp();
           });
         });
      </script>
   </body>
</html>
	<html>
	<head>
	<!-- ... -->
	<script src="flutter.js" defer></script>
	</head>
	<body>
	<div id="loading"></div>
	<script>
	window.addEventListener('load', function(ev) {
	var loading = document.querySelector('#loading');
	loading.textContent = "Loading entrypoint...";
	_flutter.loader.loadEntrypoint({
	serviceWorker: {
	serviceWorkerVersion: serviceWorkerVersion,
	}
	}).then(function(engineInitializer) {
	loading.textContent = "Initializing engine...";
	return engineInitializer.initializeEngine();
	}).then(function(appRunner) {
	loading.textContent = "Running app...";
	return appRunner.runApp();
	});
	});
	</script>
	</body>
	</html>