layout.html

<!DOCTYPE html>
<html lang="en">
<head>
   <title>{% block title %}{% endblock %}</title>

   <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.16.0/umd/popper.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js"></script>
    <script src="https://kit.fontawesome.com/a076d05399.js"></script>

    <style>
         table, th, td {
                     border: 1px solid black;
                     border-collapse: collapse;
                     padding:15px;
                        }
         body{
                background-color:#F9E6CC
              }

      </style>
      {% block head %}
      {% endblock %}
</head>

<body>

  <div class="container">

    {% block body %}
    {% endblock %}

  </div>

</body>

</html>