## `fastapi run` { #fastapi-run }

Executing `fastapi run` starts FastAPI in production mode by default.

Ama hamburgerler 🍔 hazır olmamasına rağmen Kasiyer 💁 ile işiniz "duraklıyor" ⏸, çünkü hamburgerlerin hazır olmasını bekliyoruz 🕙.

Ama tezgahtan uzaklaşıp sıranız gelene kadarmasanıza dönebilir 🔀 ve dikkatinizi aşkınıza 😍 verebilirsiniz vr bunun üzerine "çalışabilirsiniz" ⏯ 🤓. Artık "üretken" birşey yapıyorsunuz 🤓, sevgilinle 😍 flört eder gibi.

It's still possible to use `BackgroundTask` alone in FastAPI, but you have to create the object in your code and return a Starlette `Response` including it.

/// note

Keep in mind that in this case, FastAPI won't check the contents of the list.

For example, `list[int]` would check (and document) that the contents of the list are integers. But `list` alone wouldn't.

///

## Declare more metadata { #declare-more-metadata }

You can add more information about the parameter.

	// for delete's we do not need to honor storage
	// class for objects that have reduced quorum
	// due to storage class - this only needs to be honored
	// for Read() requests alone that we already do.
	writeQuorum := len(disks)/2 + 1

	g := errgroup.WithNErrs(len(disks))
	for index := range disks {
		g.Go(func() error {
			if disks[index] == nil {
				return errDiskNotFound

```Dockerfile
CMD ["fastapi", "run", "app/main.py", "--proxy-headers", "--port", "80"]
```

#### Docker Cache { #docker-cache }

There's an important trick in this `Dockerfile`, we first copy the **file with the dependencies alone**, not the rest of the code. Let me tell you why is that.

```Dockerfile
COPY ./requirements.txt /code/requirements.txt
```