public/maintenance/index.html
<!doctype html>
<html>
<head>
<meta charset="UTF-8"/>
<title>hacken.in - Maintenance</title>
<style>
h1,p { font-family: monospace; text-align: center; width: 50%; margin: auto}
</style>
</head>
<body>
<h1>Maintenance mode</h1>
<p><img alt="Hacken.in logo" src="logo.png" /></p>
<p>Sorry, hacken.in is taking a short break for maintenance. We'll be back in a jiffy. Please try again in a few seconds!</p>
</body>
</html>