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## What this PR does Adds a comprehensive FastAPI cheatsheet at `backend/fastapi.py` and updates the README with a link to it. ## Why FastAPI? - FastAPI is one of the most popular and fastest-growing Python backend frameworks - The repo already has Django and Laravel as backend frameworks — FastAPI is the natural missing Python backend - Consistently ranks in the top 5 most loved frameworks in the Stack Overflow Developer Survey ## What's covered - Installation & app setup - Path operations (GET, POST, PUT, PATCH, DELETE) - Path & query parameters - Request body with Pydantic models & validation - Response models & status codes - HTTP exceptions & custom error handlers - Headers, cookies, forms & file uploads - Dependency injection - Security & authentication (OAuth2, HTTP Basic) - Background tasks - Middleware (CORS, GZip, custom) - Routers for splitting routes across files - Lifespan events (startup/shutdown) - Async support - Custom responses (HTML, File, Stream, Redirect) - Testing with TestClient
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What this PR does
Adds a comprehensive FastAPI cheatsheet at
backend/fastapi.pyand updates the README with a link to it.Why FastAPI?
What's covered