src/master-web-ui/404.twig

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
    <meta name="description" content="">
    <meta name="author" content="">
    <link rel="icon" href="/favicon.ico">

    <title>{{ corp }}</title>

    <!-- Bootstrap core CSS -->
    <link href="/assets/css/bootstrap.min.css" rel="stylesheet">
</head>

<body>
<!-- Navigation -->
<div class="d-flex flex-column flex-md-row align-items-center p-3 px-md-4 mb-3 bg-white border-bottom shadow-sm">
    <h5 class="my-0 mr-md-auto font-weight-normal">{{ corp }}</h5>
    <nav class="my-2 my-md-0 mr-md-3">
        <a class="p-2 text-dark" href="/">Home</a>
        <a class="p-2 text-dark" href="/upload">Upload</a>
        <a class="p-2 text-dark" href="/color">Color</a>
        <a class="p-2 text-dark" href="/url">Url</a>
    </nav>
</div>

<div class="container">
    <div class="row">
        <img src="/assets/images/notfound.jpg" class="rounded mx-auto d-block"/>
    </div>
</div>

<!-- Bootstrap core JavaScript
================================================== -->
<!-- Placed at the end of the document so the pages load faster -->
<script src="/assets/js/jquery.js"></script>
<script src="/assets/js/popper.js"></script>
<script src="/assets/js/bootstrap.min.js"></script>
</body>
</html>