What is Django and its installation

backend/django.md

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+# What is Django
+
+  The Django framework implements the Model-View-Template architectural pattern,\
+  or MVT for short, which is actually a modification of the MVC (Model-View-Controller) pattern common in web programming.
+
+The main elements of the pattern:
+
+-   URL dispatcher: When a request is received, based on the requested URL,\
+    determines which resource should handle this request.
+-   View: receives a request, processes it, and sends some response back to the user.\
+    If processing a request requires access to the model and database, then the View interacts with them.\
+    Can use Template or templates to create a response.\
+    In the MVC architecture, controllers (but not views) correspond to this component.\
+-   Model: describes the data used in the application.\
+    Individual classes generally correspond to tables in a database.\
+-   Template: Represents the presentation logic as generated html markup.\
+    In MVC, this component corresponds to View, that is, views.
+
+
+# Installing and configuring Django
+
+## Pip package manager
+
+  If pip was previously installed, you can update it with the command
+-   `pip install --upgrade pip`
+
+## Installing a virtual environment (venv)
+
+  Create a virtual environment
+-   `python -m venv .venv`
+
+## Activating a virtual environment
+
+  Activation in Windows on the command line
+-   `.venv\Scripts\activate.bat`
+
+  Activation on Linux and MacOS
+-   `source .venv/bin/activate`
+
+## Installing Django
+
+  Installing Django
+-   `python -m pip install Django`
+
+  If we are interested in a specific version of Django, then we can specify it during installation:
+-   `python -m pip install django~=4.0.0`
+
+## Deactivate a virtual environment
+
+  After finishing working with the virtual environment, we can deactivate it using the command:
+-   `deactivate`