Welcome to Testing, Settings, Deployment, and Capstone — the eighth and final module of the course. You’ve built every piece of a real API: endpoints, validation, a database, authentication, structure, and streaming. This module adds the professional polish that makes an API shippable — automated tests, clean configuration, and deployment — and then brings everything together in a single capstone project.

You’ll write automated tests with pytest and TestClient so changes don’t silently break things, manage configuration and secrets with pydantic-settings (loading from environment variables, never hardcoding keys), and customize your docs and deploy with uvicorn, a Dockerfile, and a requirements.txt. Then the two-part capstone: first you’ll build the complete Task Manager API — Pydantic validation, a SQLModel database, JWT-protected routes, and a clean router layout, all in one coherent app — and then test, configure, and deploy it, finishing with a /health check and the exact files you need to run it anywhere.

Every example is real, runnable code verified end to end — including a full pytest suite that passes. Start with Lesson 1, where you’ll write your first automated tests. By the end of this module you’ll have a complete, tested, deployable API and the skills to ship any FastAPI project.