Lesson 09 · 10 min
Settings, CORS, and production
Configuration from the environment, access for the frontend, and running on a server.
10 minLesson 9 of 9Practice includedAsk AI on any point
pydantic-settings reads environment variables (and .env) into a typed class: if DATABASE_URL is missing, the app fails at startup with a clear error. Settings are passed via Depends(get_settings), which makes them easy to replace in tests. CORSMiddleware lets a frontend on another domain read responses. On a server, run fastapi run or uvicorn with several workers.
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