Code should be in web

web/index.php

@@ -0,0 +1,9 @@
+<?php
+header('Cache-Control: max-age=20, stale-while-revalidate=80');
+sleep(10);
+print('This is a slow test. ' . date('Y-m-d H:i:s'));
+?>
+<p id="js-date"></p>
+<script type="text/javascript">
+  document.getElementById('js-date').innerText(new Date().toISOString());
+</script>