Sync fastapi docs from 50fa3f7c on 2026-01-11

docs_src/advanced_middleware/tutorial001_py39.py

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+from fastapi import FastAPI
+from fastapi.middleware.httpsredirect import HTTPSRedirectMiddleware
+
+app = FastAPI()
+
+app.add_middleware(HTTPSRedirectMiddleware)
+
+
+@app.get("/")
+async def main():
+    return {"message": "Hello World"}