Clarify that you need to wait 10 seconds after the docker command completes

readme.md

@@ -94,7 +94,7 @@ cd bakerydemo
 docker compose up --build -d
 ```
 
-Wait 10 seconds for the database setup to complete. Then run:
+After this command completes and returns to the command prompt, wait 10 more seconds for the database setup to complete. Then run:
 
 ```bash
 docker compose run app /venv/bin/python manage.py load_initial_data