Django Admin Template extends, Add custom logo and favicon. Save the file in templates/admin/base_site.html

base_site.html

{% extends "admin/base.html" %}
{% load static %}

{% block branding %}
<img src="{% static 'img/lowellbooks_logo_horizontal.webp' %}" alt="logo">
{{ block.super }}
{% endblock %}

{% block extrahead %}
<link rel="shortcut icon" href="{% static 'img/favicon/book.png' %}" />
{% endblock %}