And it's also used internally when mounting sub-applications.

## Proxy with a stripped path prefix

Having a proxy with a stripped path prefix, in this case, means that you could declare a path at `/app` in your code, but then, you add a layer on top (the proxy) that would put your **FastAPI** application under a path like `/api/v1`.

In this case, the original path `/app` would actually be served at `/api/v1/app`.

...
```

#### What is OpenAPI for

The OpenAPI schema is what powers the two interactive documentation systems included.

And there are dozens of alternatives, all based on OpenAPI. You could easily add any of those alternatives to your application built with **FastAPI**.

You could also use it to generate code automatically, for clients that communicate with your API. For example, frontend, mobile or IoT applications.

* 🌐 Add Bengali translations for `docs/bn/docs/python-types.md`. PR [#11376](https://github.com/tiangolo/fastapi/pull/11376) by [@imtiaz101325](https://github.com/imtiaz101325).
* 🌐 Add Korean translation for `docs/ko/docs/tutorial/security/simple-oauth2.md`. PR [#5744](https://github.com/tiangolo/fastapi/pull/5744) by [@KdHyeon0661](https://github.com/KdHyeon0661).

So, what we will do next is add the code to document how that *external API* should look like to receive the callback from *your API*.

RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt

COPY ./app /code/app

CMD ["fastapi", "run", "app/main.py", "--port", "80"]

# If running behind a proxy like Nginx or Traefik add --proxy-headers
# CMD ["fastapi", "run", "app/main.py", "--port", "80", "--proxy-headers"]
```

</details>

## What is a Container