#### 도커 캐시

이 `Dockerfile`에는 중요한 트릭이 있는데, 처음에는 **의존성이 있는 파일만** 복사하고, 나머지 코드는 그대로 둡니다. 왜 이런 방법을 써야하는지 설명하겠습니다.

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

도커와 다른 도구들은 컨테이너 이미지를 **증가하는 방식으로 빌드**합니다. `Dockerfile`의 맨 윗 부분부터 시작해, 레이어 위에 새로운 레이어를 더하는 방식으로, `Dockerfile`의 각 지시 사항으로 부터 생성된 어떤 파일이든  더해갑니다.

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v2

      - name: Setup dockerfile for build test
        run: |
          GO_VERSION=$(go version | cut -d ' ' -f 3 | sed 's/go//')
          echo Detected go version $GO_VERSION
          cat > Dockerfile.fips.test <<EOF
          FROM golang:${GO_VERSION}
          COPY . /minio
          WORKDIR /minio

!!! tip "Dica"
    Está com pressa e já sabe dessas coisas? Pode ir direto para [`Dockerfile` abaixo 👇](#construindo-uma-imagem-docker-para-fastapi).


<details>
<summary>Visualização do Dockerfile 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

使用 Linux 容器有几个优点，包括**安全性**、**可复制性**、**简单性**等。

!!! tip
    赶时间并且已经知道这些东西了？ 跳转到下面的 [`Dockerfile` 👇](#fastapi-docker_1)。


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

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

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

!!! tip "Tipp"
    Sie haben es eilig und kennen sich bereits aus? Springen Sie zum [`Dockerfile` unten 👇](#ein-docker-image-fur-fastapi-erstellen).

<Details>
<summary>Dockerfile-Vorschau 👀</summary>

```Dockerfile
FROM python:3.9

WORKDIR /code

COPY ./requirements.txt /code/requirements.txt

!!! 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

COPY ./requirements.txt /code/requirements.txt

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

    Refer to the
    [CPU-only developer Dockerfile](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/dockerfiles/dockerfiles/devel-cpu.Dockerfile)
    and
    [GPU developer Dockerfile](https://github.com/tensorflow/tensorflow/blob/master/tensorflow/tools/dockerfiles/dockerfiles/devel-gpu.Dockerfile)
    for the required packages. Alternatively, use the said

📤 ⚠ 🎱 👉 `Dockerfile`, 👥 🥇 📁 **📁 ⏮️ 🔗 😞**, 🚫 🎂 📟. ➡️ 👤 💬 👆 ⚫️❔ 👈.

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

☁ & 🎏 🧰 **🏗** 👉 📦 🖼 **🔁**, 🚮 **1️⃣ 🧽 🔛 🔝 🎏**, ▶️ ⚪️➡️ 🔝 `Dockerfile` & ❎ 🙆 📁 ✍ 🔠 👩‍🌾 `Dockerfile`.

☁ & 🎏 🧰 ⚙️ **🔗 💾** 🕐❔ 🏗 🖼, 🚥 📁 🚫 🔀 ↩️ 🏁 🕰 🏗 📦 🖼, ⤴️ ⚫️ 🔜 **🏤-⚙️ 🎏 🧽** ✍ 🏁 🕰, ↩️ 🖨 📁 🔄 & 🏗 🆕 🧽 ⚪️➡️ 🖌.

### Crie um `Dockerfile`

* Vá para o diretório de seu projeto.
* Crie um `Dockerfile` com:

```Dockerfile
FROM tiangolo/uvicorn-gunicorn-fastapi:python3.7

COPY ./app /app
```

#### Grandes aplicações

# shellcheck disable=SC1001
LATEST_IPTABLES_DISTROLESS_SHA256=$(crane digest gcr.io/istio-release/iptables | awk -F\: '{print $2}')
sed -i -E "s/sha256:[a-z0-9]+/sha256:${LATEST_IPTABLES_DISTROLESS_SHA256}/g" pilot/docker/Dockerfile.proxyv2