我有一个 Windows Server 2016 Box，我想用它来构建部署 Python Flask 应用程序的 Docker EE Windows 容器。
我尝试在没有代理环境变量的情况下进行构建。我试过设置代理环境变量（我可能做错了，我使用了带有 Flask 分配端口的服务器 IP 地址。）
我也试过只在 dockerfile 中安装一个包而不是 require.txt 文件，但没有成功。
我不相信 Windows Box 有代理设置，因为我运行：netsh winhttp show proxy 并且它说 Direct access (no proxy server).
我尝试重新启动 docker 服务并尝试使用 --network=host 进行构建。我读过尝试将 DNS 服务器设置为 8.8.8.8 可能值得，但我不确定在哪里设置它。任何人都可以提供您的经验吗？
请记住，我可以成功运行此程序：docker run hello-world:nanoserver-sac2016
这里是 docker 文件：
FROM python:3.8
WORKDIR /app
COPY . .
RUN pip install -r requirements.txt
COPY . .
ENTRYPOINT ["python"]
CMD ["wsgi.py"]
EXPOSE 8000
这里是错误：
PS C:\Users\administrator.user1\Desktop\FlaskReportAppDev> docker build -t myflaskapp .
Sending build context to Docker daemon 252.7MB
Step 1/8 : FROM python:3.8
---> d070676dfed8
Step 2/8 : WORKDIR /app
---> Using cache
---> f02733df8e5f
Step 3/8 : COPY . .
---> ef40674fc745
Step 4/8 : RUN pip install -r requirements.txt
---> Running in 6c984bec9495
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021B39F42F
D0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/click/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021B39ED33
70>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/click/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021B3831A2
20>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/click/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021B39EECA
90>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/click/
WARNING: Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'NewConnectionError('<pip._vendor.urllib3.connection.HTTPSConnection object at 0x0000021B39F4D4
F0>: Failed to establish a new connection: [Errno 11001] getaddrinfo failed')': /simple/click/
ERROR: Could not find a version that satisfies the requirement click==7.1.1 (from versions: none)
ERROR: No matching distribution found for click==7.1.1
The command 'powershell -Command $ErrorActionPreference = 'Stop'; $ProgressPreference = 'SilentlyContinue'; pip install -r requirements.txt' returned a non-zero code: 1