404.pug

doctype html
html(lang="de")
  head
    title= "404 - Page not found"
    meta(charset="UTF-8")
    meta(name="viewport", content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no")
    link(rel="stylesheet", type="text/css", href="/css/bootstrap.min.css")
    style.
      .container { 
        height: 400px;
        position: relative;
      }
      .center {
        margin: 0;
        position: absolute;
        top: 50%;
        left: 50%;
        -ms-transform: translate(-50%, -50%);
        transform: translate(-50%, -50%);
      }
  body
    div(class="container")
      div(class="center", align="center")
        a(href="https://m4lab.hft-stuttgart.de")
          img(src="https://transfer.hft-stuttgart.de/images/demo/m4lab_logo.jpg", class="img-responsive center-block", width="185", height="192")
        br
        br
        p(class="h5") 404. The requested URL was not found.
    // Bootstrap
    script(src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous")