<!DOCTYPE html>
<html>
<head>
<title>Missing upstream</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<link rel="stylesheet" href="bower_components/bootstrap/dist/css/bootstrap.min.css">
</head>
<body style='color:grey;text-align:center;font-family: Verdana, "Lucida Sans Unicode", sans-serif'>
<p>Oops, <b>502</b> - we are probably preparing mailcow.</p>
<h1 style="color:#999;font-size:48px">502</h1>
<p>Please do not stop the stack, while we are preparing the database or do other preparations.</p>
<p style="font-size:small"><b>What is happening?</b> - Nginx cannot connect to an upstream server.<br>
This is fine, if mailcow was just
installed or updated and can take a few minutes.<br>
Please check the logs or contact support, if the error persists.</p>
</body>
</html>