public/500.html
<!doctype html>
<html>
<head>
<meta charset="UTF-8" />
<title>We're sorry, but something went wrong (500)</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css" />
<link rel="stylesheet" href="bootstrap/css/bootstrap-responsive.min.css" />
</head>
<body>
<div class="container">
<div class="hero-unit" style="background: none;">
<div class="page-header">
<h1>
500
<small class="text-error">We're sorry, but something went wrong.</small>
</h1>
</div>
<p><a href="/" class="btn btn-success btn-large">Back to Home</a></p>
<p><small class="muted">If you are the application owner check the logs for more information.</small></p>
</div>
</div>
</html>