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<head>
        <title>Sinatra + Twitter Bootstrap</title>
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <!-- Bootstrap -->
        <link href="/vendor/bootstrap/css/bootstrap.min.css" rel="stylesheet">

        <!-- jQuery (necessary for Bootstrap's JavaScript plugins) -->
        <script src="/vendor/jquery-3.2.1.slim.min.js"></script>
        <!-- Include all compiled plugins (below), or include individual files as needed -->
        <script src="/vendor/bootstrap/js/bootstrap.min.js"></script>

        <!-- HTML5 Shim and Respond.js IE8 support of HTML5 elements and media queries -->
        <!-- WARNING: Respond.js doesn't work if you view the page via file:// -->
        <!--[if lt IE 9]>
          <script src="https://oss.maxcdn.com/libs/html5shiv/3.7.0/html5shiv.js"></script>
          <script src="https://oss.maxcdn.com/libs/respond.js/1.3.0/respond.min.js"></script>
        <![endif]-->
    </head>