为什么 docker-compose 突然失败并显示 ERROR 内部加载元数据？

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我已经运行 docker-compose build 好几天了，每天很多次，并且没有更改我的 DOCKERfiles 或 docker-compose.yml。突然一个小时前我开始得到这个：

Building frontdesk-API
Failed to get console mode for stdout: The handle is invalID.
[+] Building 10.0s (3/4)
 => [internal] load build deFinition from Dockerfile                       0.0s
[+] Building 10.1s (4/4) FINISHED
 => [internal] load build deFinition from Dockerfile                       0.0s
 => => transferring dockerfile: 32B                                        0.0s
 => [internal] load .dockerignore                                          0.0s
 => => transferring context: 2B                                            0.0s
 => ERROR [internal] load Metadata for mcr.microsoft.com/dotnet/sdk:5.0.  10.0sailed to do request: head https://mcr.microsoft.com/v2/dotnet/sdk/manifests/5.0.201-buster-slim: dial tcp: lookup mcr.microsoft.com on 192.168.65.5:53:
 => [internal] load Metadata for mcr.microsoft.com/dotnet/aspnet:5.0-bust  0.0s
------
 > [internal] load Metadata for mcr.microsoft.com/dotnet/sdk:5.0.201-buster-slim:
------
ERROR: service 'frontdesk-API' Failed to build

我尝试过的事情：

• 再次运行
• docker rm -f $(docker ps -a -q)
• docker login
• 不同的 SDK 映像

这是 DOCKERfile：

FROM mcr.microsoft.com/dotnet/aspnet:5.0-buster-slim AS base
workdir /app
EXPOSE 80
EXPOSE 443

FROM mcr.microsoft.com/dotnet/sdk:5.0.201-buster-slim AS build
workdir /app
# run this from repository root
copY ./ ./ 
#RUN ls -lha .

RUN echo 'Building FrontDesk container'

workdir /app/FrontDesk/src/FrontDesk.API
#RUN ls -lha .
RUN dotnet restore

RUN dotnet build "FrontDesk.API.csproj" -c Release -o /app/build

FROM build AS publish
RUN dotnet publish "FrontDesk.API.csproj" -c Release -o /app/publish

FROM base AS final
workdir /app
copY --from=publish /app/publish .
ENTRYPOINT ["dotnet","FrontDesk.API.dll"]

我怎样才能让我的构建重新工作？

% docker pull mcr.microsoft.com/dotnet/sdk:5.0
Error response from daemon: Get https://mcr.microsoft.com/v2/: service Unavailable

% docker pull mcr.microsoft.com/dotnet/sdk:5.0
5.0: Pulling from dotnet/sdk
received unexpected http status: 500 Internal Server Error

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