python3 manage.py makemigrations
python3 manage.py migrate
python3 manage.py createsuperuser # Create a superuser
python3 manage.py runserver
first create a user by the admin, then use this user as the customer to test all functions.
For example, a customer named testuser.
the main page will show all the labels that this customer has.
click add button to add a new label.
click an existing label to delete or update.