docs: 📝 Update README.rst with better explanations and formatting + fix broken link

README.rst

@@ -28,11 +28,11 @@ get started with testing or developing `django-helpdesk`. The demo project
 resides in the `demo/` top-level folder.
 
 It's likely that you can start up a demo project server by running
-only the command:
+only the command (consider creating a virtualenv before):
 
     make rundemo
 
-or with docker:
+or with docker::
 
     docker build . -t demodesk
     docker run --rm -v "$PWD:/app" -p 8080:8080 demodesk
@@ -74,27 +74,33 @@ Developer Environment
 
 Follow these steps to set up your development environment to contribute to helpdesk:
  - check out the helpdesk app to your local file system::
-        git clone https://github.com/django-helpdesk/django-helpdesk.git
+
+    git clone https://github.com/django-helpdesk/django-helpdesk.git
  
- - install a virtual environment
-     - using virtualenv from the helpdesk base folder do::
-          virtualenv .venv && source .venv/bin/activate
+ - install a virtual environment and activate it::
+  
+    python -m venv .venv && source .venv/bin/activate
 
  - install the requirements for development::
+
     pip install -r requirements.txt -r requirements-dev.txt
 
- - install the requirements for testing as well::
-    pip install -r requirements.txt -r requirements-dev.txt -r requirements-testing.txt
+ - you can install the requirements for testing as well::
 
-To reactivate a VENV just run:
-   source .venv/bin/activate
+    pip install -r requirements-testing.txt
+
+To deactivate the virtual environment, use ``deactivate``. Then to reactivate it, just run::
+
+    source .venv/bin/activate
 
 To see option for the Makefile run: `make`
 
 The project enforces a standardized formatting in the CI/CD pipeline. To ensure you have the correct formatting run::
+
     make checkformat
     
 To auto format any code use this::
+
     make format
 
 Testing
@@ -145,5 +151,5 @@ Note that django-helpdesk is distributed with 3rd party products which
 have their own licenses. See LICENSE.3RDPARTY for license terms for
 included packages.
 
-.. _note: http://docs.djangoproject.com/en/dev/ref/databases/#sqlite-string-matching
+.. _note: https://docs.djangoproject.com/en/dev/ref/databases/#substring-matching-and-case-sensitivity