fastapi-tutorial FastAPI docs Install requirements.txt run pip install -r requirements.txt gets anyio==3.5.0 asgiref==3.5.0 click==8.1.2 fastapi==0.75.2 h11==0.13.0 idna==3.3 pydantic==1.9.0 sniffio==1.2.0 starlette==0.17.1 typing_extensions==4.2.0 uvicorn==0.17.6