update;

backend/README.md

@@ -14,9 +14,9 @@ $ cd ./app_be
 
 $ pip install -r requirements.txt
 
-$ python manage.py makemigrations
+$ python manage.py makemigrations app_be
 $ python manage.py migrate
-$ python manage.py createsuperuser
+$ (optional) python manage.py createsuperuser
 
 $ python manage.py runserver
 ```