Change port number in instructions from 80 to 8000

Author: toshan-luktuke

README.md

@@ -41,7 +41,7 @@ For eg. `python -m venv .venv`
 `pip install -r requirements.txt`
 5. Add `.env` file to the `backend` folder. And add the variables as defined in [.env.template](./.env.template)
 6. Create the static files to serve during execution by `python manage.py collectstatic`
-7. Start the server by running `python manage.py runserver 80`
+7. Start the server by running `python manage.py runserver 8000`
 
 <!-- CONTRIBUTING -->
 ## Contributing