Bug: Documentation uses wrong localhost port for Docker deployment

Client example uses incorrect base_url (8000) while Docker runs on 7860 
path: tutorial/02-deployment.md

<img width="659" height="322" alt="Image" src="https://github.com/user-attachments/assets/236abcef-b871-4a7b-9a0a-8ade3b33fd5a" />