<!DOCTYPE html>
<html>
  <head>
    <meta charset=utf-8>
    <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
    <title>Error 404 - Page Not Found</title>
  </head>

  <body>

    <h1>
      404 Not Found
    </h1>
    <br>
  </body>
</html>

Add 404 error file missed in previous commit
Add 404 error file missed in previous commit
