```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

그러면 여러분들은 `Dockerfile` 내에 있는 파일을 복사하기 위해 그저 상응하는 경로를 바꾸기만 하면 됩니다:

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

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

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

# (1)
COPY ./main.py /code/

```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

⤴️ 👆 🔜 ✔️ 🔀 🔗 ➡ 📁 📁 🔘 `Dockerfile`:

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

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

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

# (1)
COPY ./main.py /code/

```
.
├── Dockerfile
├── main.py
└── requirements.txt
```

そうすれば、`Dockerfile`の中にファイルをコピーするために、対応するパスを変更するだけでよいです：

```{ .dockerfile .annotate hl_lines="10  13" }
FROM python:3.9

WORKDIR /code

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

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

# (1)
COPY ./main.py /code/

## Containerimages

Docker ist eines der wichtigsten Tools zum Erstellen und Verwalten von **Containerimages** und **Containern**.