我在 Macbook 上按照本教程构建示例 Docker 映像，但是当我尝试运行以下命令时：
docker build -t getting-started .
我收到以下错误：
[+] Building 3.2s (15/24)
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 1.05kB 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 34B 0.0s
=> [internal] load metadata for docker.io/library/nginx:alpine 2.7s
=> [internal] load metadata for docker.io/library/python:alpine 2.7s
=> [internal] load metadata for docker.io/library/node:12-alpine 2.7s
=> [internal] load build context 0.0s
=> => transferring context: 7.76kB 0.0s
=> [base 1/4] FROM docker.io/library/python:alpine@sha256:94cfb962c71da780c5f3d34c6e9d1e01702b8be1edd2d450c24aead4774aeefc 0.0s
=> => resolve docker.io/library/python:alpine@sha256:94cfb962c71da780c5f3d34c6e9d1e01702b8be1edd2d450c24aead4774aeefc 0.0s
=> CACHED [stage-5 1/3] FROM docker.io/library/nginx:alpine@sha256:686aac2769fd6e7bab67663fd38750c135b72d993d0bb0a942ab02ef647fc9c3 0.0s
=> CACHED [app-base 1/8] FROM docker.io/library/node:12-alpine@sha256:1ea5900145028957ec0e7b7e590ac677797fa8962ccec4e73188092f7bc14da5 0.0s
=> CANCELED [app-base 2/8] RUN apk add --no-cache python g++ make 0.5s
=> CACHED [base 2/4] WORKDIR /app 0.0s
=> CACHED [base 3/4] COPY requirements.txt . 0.0s
=> CACHED [base 4/4] RUN pip install -r requirements.txt 0.0s
=> CACHED [build 1/2] COPY . . 0.0s
=> ERROR [build 2/2] RUN mkdocs build 0.4s
------
> [build 2/2] RUN mkdocs build:
#23 0.378 Traceback (most recent call last):
#23 0.378 File "/usr/local/bin/mkdocs", line 5, in <module>
#23 0.378 from mkdocs.__main__ import cli
#23 0.378 File "/usr/local/lib/python3.10/site-packages/mkdocs/__main__.py", line 14, in <module>
#23 0.378 from mkdocs import config
#23 0.378 File "/usr/local/lib/python3.10/site-packages/mkdocs/config/__init__.py", line 2, in <module>
#23 0.378 from mkdocs.config.defaults import DEFAULT_SCHEMA
#23 0.378 File "/usr/local/lib/python3.10/site-packages/mkdocs/config/defaults.py", line 4, in <module>
#23 0.378 from mkdocs.config import config_options
#23 0.378 File "/usr/local/lib/python3.10/site-packages/mkdocs/config/config_options.py", line 5, in <module>
#23 0.378 from collections import Sequence, namedtuple
#23 0.378 ImportError: cannot import name 'Sequence' from 'collections' (/usr/local/lib/python3.10/collections/__init__.py)
------
executor failed running [/bin/sh -c mkdocs build]: exit code: 1
我使用的 Dockerfile：
# syntax=docker/dockerfile:1
FROM node:12-alpine
RUN apk add --no-cache python g++ make
WORKDIR /app
COPY . .
RUN yarn install --production
CMD ["node", "src/index.js"]
示例应用程序来自：https ://github.com/docker/getting-started/tree/master/app
我对 Docker 还很陌生，如果有人能帮助指出我如何让它工作，我将不胜感激。
解决方案：
事实证明这里有两个问题：
我应该从新创建的 Dockerfile 所在的文件夹运行该docker build -t getting-started .命令。/app在我的测试中，我从根文件夹运行命令，其中有一个不同的 Dockerfile，正如@HansKilian 指出的那样。当我在文件夹中尝试它时/app，效果很好。
根文件夹中的 Docker 文件的问题是由 Python 版本不匹配问题引起的，正如 @atline 在答案中指出的那样。按照建议进行更改后，我还可以使用该 Dockerfile 构建映像。
谢谢你们的帮助。
查看它的Dockerfile，它使用FROM python:alpine AS base，这意味着它使用了共享标签。在该文件撰写时，另一个词的意思python:alpine是“也许”python:3.9-alpine或“其他”。
但现在，这意味着python:3.10-alpine，看到这个。
问题mkdocs本身发生，它使用下一个代码：
from collections import Sequence, namedtuple
但是，如果您在 python3.9 环境中导入了上述内容，您将看到 next，它告诉您它将从 python3.10 开始停止工作：
$ docker run --rm -it python:3.9-alpine /bin/sh
/ # python
Python 3.9.7 (default, Aug 31 2021, 19:01:35)
[GCC 10.3.1 20210424] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from collections import Sequence
<stdin>:1: DeprecationWarning: Using or importing the ABCs from 'collections' instead of from 'collections.abc' is deprecated since Python 3.3, and in 3.10 it will stop working
因此，对于您来说，要使指南再次为您工作，您需要更改FROM python:alpine AS base为：
FROM python:3.9-alpine AS base
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