dataService.delete(sessionId);
        } finally {
            server.stop();
        }
    }

    public void test_execute_2instanceTx() throws Exception {
        final CrawlerWebServer server1 = new CrawlerWebServer(7070);
        server1.start();
        final CrawlerWebServer server2 = new CrawlerWebServer(7071);
        server2.start();

        final String url1 = "http://localhost:7070/";

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip

The IP `0.0.0.0` is commonly used to mean that the program listens on all the IPs available in that machine/server.

///

The docs UI would also need the OpenAPI schema to declare that this API `server` is located at `/api/v1` (behind the proxy). For example:

`x509keypairleaf=0`.

Go 1.23 changed
[`net/http.ServeContent`](/pkg/net/http#ServeContent),
[`net/http.ServeFile`](/pkg/net/http#ServeFile), and
[`net/http.ServeFS`](/pkg/net/http#ServeFS) to
remove Cache-Control, Content-Encoding, Etag, and Last-Modified headers
when serving an error. This behavior is controlled by
the [`httpservecontentkeepheaders` setting](/pkg/net/http#ServeContent).

browser("Browser")
proxy["Proxy on http://0.0.0.0:9999/api/v1/app"]
server["Server on http://127.0.0.1:8000/app"]

browser --> proxy
proxy --> server
```

/// tip | "Dica"

O IP `0.0.0.0` é comumente usado para significar que o programa escuta em todos os IPs disponíveis naquela máquina/servidor.

///

A interface de documentação também precisaria do OpenAPI schema para declarar que API `server` está localizado em `/api/v1` (atrás do proxy). Por exemplo:

///

## Exécutez votre code avec votre <abbr title="En anglais: debugger">débogueur</abbr>

Parce que vous exécutez le serveur Uvicorn directement depuis votre code, vous pouvez appeler votre programme Python (votre application FastAPI) directement depuis le <abbr title="En anglais: debugger">débogueur</abbr>.

---

By default, those files are served from a <abbr title="Content Delivery Network: A service, normally composed of several servers, that provides static files, like JavaScript and CSS. It's commonly used to serve those files from the server closer to the client, improving performance.">CDN</abbr>.

But it's possible to customize it, you can set a specific CDN, or serve the files yourself.

## Custom CDN for JavaScript and CSS

### Server Binaries

filename | sha512 hash
-------- | -----------
[kubernetes-server-linux-amd64.tar.gz](https://dl.k8s.io/v1.32.0-alpha.3/kubernetes-server-linux-amd64.tar.gz) | 9c7dea0269e894f6ca9410667720d6d1d1bc9e690b9da5d34e7c775a0f6fbcf22c51b6bd2805ea6fb0e61eca815aea2fb675c4827d1bc14cbecb604220d18ed6

INFO:     Started server process [2248757]
INFO:     Waiting for application startup.
INFO:     Application startup complete.
```

</div>

<details markdown="1">
<summary>About the command <code>fastapi dev main.py</code>...</summary>

	@scp -q -r minio-release/$(GOOS)-$(GOARCH)/* ******@****.***:~/releases/server/minio/hotfixes/linux-amd64/archive
	@scp -q -r minio-release/$(GOOS)-$(GOARCH)/* ******@****.***:~/releases/server/minio/hotfixes/linux-amd64/
	@scp -q -r minio-release/$(GOOS)-$(GOARCH)/* ******@****.***:~/releases/server/minio/hotfixes/linux-amd64/archive

They tend to require more complex configurations, a message/job queue manager, like RabbitMQ or Redis, but they allow you to run background tasks in multiple processes, and especially, in multiple servers.

To see an example, check the [Project Generators](../project-generation.md){.internal-link target=_blank}, they all include Celery already configured.