Then the cashier 💁 says "I'm finished with doing the burgers" by putting your number on the counter's display, but you don't jump like crazy immediately when the displayed number changes to your turn number. You know no one will steal your burgers because you have the number of your turn, and they have theirs.

Using Linux containers has several advantages including **security**, **replicability**, **simplicity**, and others.

/// tip

In a hurry and already know this stuff? Jump to the [`Dockerfile` below 👇](#build-a-docker-image-for-fastapi).

///

<details>
<summary>Dockerfile Preview 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

	// Return extension of profile
	Extension() string
}

// Global profiler to be used by service go-routine.
var (
	globalProfiler   map[string]minioProfiler
	globalProfilerMu sync.Mutex
)

// dump the request into a string in JSON format.
func dumpRequest(r *http.Request) string {
	header := r.Header.Clone()
	header.Set("Host", r.Host)
	// Replace all '%' to '%%' so that printer format parser

	go func() {
		select {
		case <-cc:
			return
		case <-c:
			buf := make([]byte, 1<<20)
			stacklen := runtime.Stack(buf, true)
			fmt.Printf("=== Timeout, assuming deadlock ===\n*** goroutine dump...\n%s\n*** end\n", string(buf[:stacklen]))
			os.Exit(2)
		}
	}()
	return func() {
		close(cc)
	}

	go func() {
		select {
		case <-cc:
			return
		case <-c:
			buf := make([]byte, 1<<20)
			stacklen := runtime.Stack(buf, true)
			fmt.Printf("=== Timeout, assuming deadlock ===\n*** goroutine dump...\n%s\n*** end\n", string(buf[:stacklen]))
			os.Exit(2)
		}
	}()
	return func() {
		close(cc)
	}
}

func assertNoActive(t *testing.T, c *Connection) {
	t.Helper()

labels.facet_filetype_aif=AIF音訊
labels.facet_filetype_midi=MIDI音訊
labels.facet_filetype_mpga=MPGA音訊
labels.facet_filetype_mp4a=MP4A音訊
labels.facet_filetype_oga=OGA音訊
labels.facet_filetype_wepb=WEBP圖像
labels.facet_filetype_bmp=BMP圖像
labels.facet_filetype_ico=ICO圖像
labels.facet_filetype_png=PNG圖像
labels.facet_filetype_svg=SVG圖像
labels.facet_filetype_tiff=TIFF圖像
labels.facet_filetype_jpg=JPEG圖像
labels.facet_filetype_archive=存檔

labels.facet_filetype_midi=Audio MIDI
labels.facet_filetype_mpga=Audio MPGA
labels.facet_filetype_mp4a=Audio MP4A
labels.facet_filetype_oga=Audio OGA
labels.facet_filetype_wepb=Obraz WEBP
labels.facet_filetype_bmp=Obraz BMP
labels.facet_filetype_ico=Obraz ICO
labels.facet_filetype_png=Obraz PNG
labels.facet_filetype_svg=Obraz SVG
labels.facet_filetype_tiff=Obraz TIFF
labels.facet_filetype_jpg=Obraz JPEG

labels.facet_filetype_midi=MIDI Ses
labels.facet_filetype_mpga=MPGA Ses
labels.facet_filetype_mp4a=MP4A Ses
labels.facet_filetype_oga=OGA Ses
labels.facet_filetype_wepb=WEBP Görsel
labels.facet_filetype_bmp=BMP Görsel
labels.facet_filetype_ico=ICO Görsel
labels.facet_filetype_png=PNG Görsel
labels.facet_filetype_svg=SVG Görsel
labels.facet_filetype_tiff=TIFF Görsel
labels.facet_filetype_jpg=JPEG Görsel

labels.facet_filetype_midi=Аудио MIDI
labels.facet_filetype_mpga=Аудио MPGA
labels.facet_filetype_mp4a=Аудио MP4A
labels.facet_filetype_oga=Аудио OGA
labels.facet_filetype_wepb=Изображение WEBP
labels.facet_filetype_bmp=Изображение BMP
labels.facet_filetype_ico=Изображение ICO
labels.facet_filetype_png=Изображение PNG
labels.facet_filetype_svg=Изображение SVG
labels.facet_filetype_tiff=Изображение TIFF
labels.facet_filetype_jpg=Изображение JPEG

labels.facet_filetype_midi=Audio MIDI
labels.facet_filetype_mpga=Audio MPGA
labels.facet_filetype_mp4a=Audio MP4A
labels.facet_filetype_oga=Audio OGA
labels.facet_filetype_wepb=Imagen WEBP
labels.facet_filetype_bmp=Imagen BMP
labels.facet_filetype_ico=Imagen ICO
labels.facet_filetype_png=Imagen PNG
labels.facet_filetype_svg=Imagen SVG
labels.facet_filetype_tiff=Imagen TIFF
labels.facet_filetype_jpg=Imagen JPEG