what should base_generic.html look like
<!DOCTYPE html>
<html lang="en">
<head>
{% block title %}<title>Local Library</title>{% endblock %}
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" integrity="sha384-TX8t27EcRE3e/ihU7zmQxVncDAy5uIKz4rEkgIXeMed4M0jlfIDPvg6uqKI2xXr2" crossorigin="anonymous">
<!-- Add additional CSS in static file -->
{% load static %}
<link rel="stylesheet" href="{% static 'css/styles.css' %}">
</head>
<body>
<div class="container-fluid">
<div class="row">
<div class="col-sm-2">
{% block sidebar %}
<ul class="sidebar-nav">
<li><a href="{% url 'index' %}">Home</a></li>
<li><a href="">All books</a></li>
<li><a href="">All authors</a></li>
</ul>
{% endblock %}
</div>
<div class="col-sm-10 ">{% block content %}{% endblock %}</div>
</div>
</div>
</body>
</html>