Update README to include cmd to run pylint successfully in a venv

Author: MikaTech-dev

README.md

@@ -31,4 +31,7 @@ Run server
 
 Migrate database models
 
-    python manage.py makemigrations
+    python manage.py makemigrations
+
+Run pylint, load the django plugin, point to your django settings and specify what directory to lint
+    pylint --load-plugins pylint_django --django-settings-module=assessment_engine.settings ./api/