<html>
  <head>
    <title>Spanglboard</title>
    <link rel="shortcut icon" href="jurgen.gif" />

    <style type="text/css">
      .container {
        margin: 0 auto;
        width: 20px;
        top: 50%;
        position: relative;
        transform: translateY(-50%);
      }
    </style>

  </head>

  <body>
    <div class="container">
      <img src="jurgen.gif" />
    </div>
  </body>
</html>
<html>
  <head>
    <meta charset="utf-8">
    <title>Spanglboard</title>
    <link rel="shortcut icon" href="jurgen.gif" />
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">

    <style type="text/css">
      .container {
        margin: 0 auto;
        width: 20px;
        top: 50%;
        position: relative;
        transform: translateY(-50%);
      }
    </style>

  </head>

  <body>
    <div class="container">
      <img src="jurgen.gif" />
    </div>
  </body>
</html>

Add a couple of meta tags
Add a couple of meta tags