Update Django and Django Rest Framework descriptions in doc

Extended the introduction section in the project's documentation by adding detailed descriptions for Django and Django Rest Framework. These include basic information about their functionality, usage, and the organizations that maintain them.

docs/index.md

@@ -20,6 +20,13 @@ Requirements list:
 ## Introduction and Overview
 
 - 🎬 Lecture: Introduction to Django and Django Rest Framework, and overview of API development.
+
+### [Django](https://www.djangoproject.com/)
+To start, we first need to understand what Django is. Django is the most popular web framework in the Python ecosystem, characterized by its high-level structure that encourages rapid development and clean, pragmatic design. It has been constructed by experienced developers and aims to mitigate the hassles of web development; this allows developers to focus their attention on writing their app without feeling the need to reinvent the wheel. Django is a free and open-source framework that is ingrained in the model-template-views architectural pattern. Its maintenance is overseen by the Django Software Foundation, an independent, non-profit organization based in the United States.
+
+### [Django Rest Framework](https://www.django-rest-framework.org/)
+The Django Rest Framework is a powerful library constructed on top of Django, with a unique interlinking to the Django Model. This relationship endows Django with the enhanced ability to create application programming interfaces (APIs).
+
 - 💡 Purpose: Setting the stage and objectives for the tutorial.
 
 ## Django Models