docker desktop tutorial 示例报错的处理

就是一打开这个程序后的tutorial
我把这个步骤手打出来（居然没法粘贴）

# step1 clone
docker run --name repo alpine/git clone https://github.com/docker/getting-started.git
docker cp repo:/git/getting-started/ .

# step2 build 
cd getting-started
docker build -t docker101tutorial .



# step3 run
docker run -d -p 80:80 --name docker-tutorail docker101tutorial


# share
docker tag docker101tutorial liaoxin/docker101tutorial
docker push liaoxin/docker101tutorial

在第二步build的时候总是报错

 > [build 2/2] RUN mkdocs build:
#23 0.568 Traceback (most recent call last):
#23 0.568   File "/usr/local/bin/mkdocs", line 8, in 
#23 0.568     sys.exit(cli())
#23 0.568   File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1130, in __call__
#23 0.568     return self.main(*args, **kwargs)
#23 0.568   File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1055, in main
#23 0.568     rv = self.invoke(ctx)
#23 0.568   File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1657, in invoke
#23 0.569     return _process_result(sub_ctx.command.invoke(sub_ctx))
#23 0.569   File "/usr/local/lib/python3.10/site-packages/click/core.py", line 1404, in invoke
#23 0.569     return ctx.invoke(self.callback, **ctx.params)
#23 0.569   File "/usr/local/lib/python3.10/site-packages/click/core.py", line 760, in invoke
#23 0.570     return __callback(*args, **kwargs)
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/__main__.py", line 187, in build_command
#23 0.570     build.build(config.load_config(**kwargs), dirty=not clean)
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/config/base.py", line 216, in load_config
#23 0.570     from mkdocs.config.defaults import get_schema
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/config/defaults.py", line 1, in 
#23 0.570     from mkdocs.config import config_options
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/config/config_options.py", line 8, in 
#23 0.570     from mkdocs import utils, theme, plugins
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/theme.py", line 6, in 
#23 0.570     from mkdocs.utils import filters
#23 0.570   File "/usr/local/lib/python3.10/site-packages/mkdocs/utils/filters.py", line 13, in 
#23 0.570     @jinja2.contextfilter
#23 0.570 AttributeError: module 'jinja2' has no attribute 'contextfilter'
------
executor failed running [/bin/sh -c mkdocs build]: exit code: 1

报这样的错误

Google：docker build error mkdocs build
在StackOverflow的一个帖子上
找到了答案，不是得票最高的那个答案，得票最高的那个答案说，是因为python的版本不对，我更改了dockerfile中的python版本，也还是报错。

答案是得票最低的那个，其实是requirements.txt，里面少写了包

加入这个之后，ok成功了。

参考