如果你的 FastAPI 是单个文件，例如没有`./app`目录的`main.py`，则你的文件结构可能如下所示：

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

然后你只需更改相应的路径即可将文件复制到`Dockerfile`中：

```{ .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/

# (2)

<metadata>
  <groupId>org.codelibs.fess</groupId>
  <artifactId>fess-crawler-db-h2</artifactId>
  <versioning>
    <latest>1.0.12</latest>
    <release>1.0.12</release>
    <versions>
      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>

<metadata>
  <groupId>org.codelibs.fess</groupId>
  <artifactId>fess-crawler-db-mysql</artifactId>
  <versioning>
    <latest>1.0.12</latest>
    <release>1.0.12</release>
    <versions>
      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>

<metadata>
  <groupId>org.codelibs.fess</groupId>
  <artifactId>fess-crawler-db</artifactId>
  <versioning>
    <latest>1.0.12</latest>
    <release>1.0.12</release>
    <versions>
      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>

```
.
├── 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/

# (2)

      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>
      <version>1.0.8</version>
      <version>1.0.9</version>
      <version>1.0.10</version>
      <version>1.0.11</version>
      <version>1.0.12</version>
      <version>1.1.0</version>

      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>
      <version>1.0.8</version>
      <version>1.0.9</version>
      <version>1.0.10</version>
      <version>1.0.11</version>
      <version>1.0.12</version>
      <version>1.1.0</version>

      <version>1.0.0</version>
      <version>1.0.1</version>
      <version>1.0.2</version>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>
      <version>1.0.8</version>
      <version>1.0.9</version>
      <version>1.0.10</version>
      <version>1.0.11</version>
      <version>1.0.12</version>
      <version>1.1.0</version>

    <release>3.16.0</release>
    <versions>
      <version>1.0.3</version>
      <version>1.0.4</version>
      <version>1.0.5</version>
      <version>1.0.6</version>
      <version>1.0.7</version>
      <version>1.0.8</version>
      <version>1.0.9</version>
      <version>1.0.10</version>
      <version>1.0.11</version>
      <version>1.0.12</version>
      <version>1.1.0</version>
      <version>1.1.1</version>

```
.
├── 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/

# (2)