Update README.md

README.md

@@ -126,7 +126,18 @@ Make sure you have Python 3.10 or 3.11 installed.
 2. (optional) Create a Python virtual environment:
 You can follow the [Python official documentation](https://docs.python.org/3/tutorial/venv.html) for virtual environments .
 
-3. Change to the `application/` subdir and install dependencies for the backend:
+a) On Mac OS and Linux
+```commandline
+python -m venv venv
+. venv/bin/activate
+```
+b) On Windows
+```commandline
+python -m venv venv
+ venv/Scripts/activate
+```
+
+4. Change to the `application/` subdir and install dependencies for the backend:
 ```commandline
 pip install -r application/requirements.txt
 ```