<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="manifest" href="icons_app_manifest.json">
</head>
<body>
<h1>Web app that handles file opening</h1>
<script>
window.onload = () => {
navigator.serviceWorker.register('/web_app_file_handling/service_worker.js');
};
</script>
</body>
</html>