```

⛔️ **Shell** form:

```Dockerfile
# ⛔️ Don't do this
CMD fastapi run app/main.py --port 80
```

Make sure to always use the **exec** form to ensure that FastAPI can shutdown gracefully and [lifespan events](../advanced/events.md){.internal-link target=_blank} are triggered.

```Dockerfile
# ⛔️ Não faça assim
CMD fastapi run app/main.py --port 80
```

Garanta que você sempre use a forma **exec** para assegurar que o FastAPI consiga encerrar graciosamente e que os [eventos de lifespan](../advanced/events.md){.internal-link target=_blank} sejam disparados.

```Dockerfile
# ⛔️ Tun Sie das nicht
CMD fastapi run app/main.py --port 80
```

Achten Sie darauf, stets die **exec** form zu verwenden, um sicherzustellen, dass FastAPI ordnungsgemäß heruntergefahren wird und [Lifespan-Events](../advanced/events.md){.internal-link target=_blank} ausgelöst werden.

```Dockerfile
# ⛔️ No hagas esto
CMD fastapi run app/main.py --port 80
```

Asegúrate de siempre usar la **forma exec** para garantizar que FastAPI pueda cerrarse de manera adecuada y que [los eventos de lifespan](../advanced/events.md){.internal-link target=_blank} sean disparados.

ml_models = {}


@asynccontextmanager
async def lifespan(app: FastAPI):
    # Load the ML model
    ml_models["answer_to_everything"] = fake_answer_to_everything_ml_model
    yield
    # Clean up the ML models and release the resources
    ml_models.clear()


app = FastAPI(lifespan=lifespan)


@app.get("/predict")
async def predict(x: float):