<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>{% block title %}{% endblock %}</title>
    {% block head %}
    {% endblock %}
  </head>
  <body>
    {% block body %}
    {% endblock %}
  </body>
</html>

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>{% block title %}{% endblock %}</title>
    <link href="{{ url_for('static', filename='bootstrap/css/bootstrap.min.css') }}" rel="stylesheet">
    <script src="{{ url_for('static', filename='bootstrap/js/bootstrap.min.js') }}"></script>
    {% block head %}
    {% endblock %}
  </head>
  <body>
    {% block body %}
    {% endblock %}
  </body>
</html>

Include bootstrap in server base template
Include bootstrap in server base template
