COPY失败：CreateFile \？\ C：\ ProgramData \ Docker \ tmp \ docker-builder056926419 \ WebApplication1.sln：系统找不到指定的文件。
样本文件：
FROM microsoft/aspnetcore:2.0 AS base
WORKDIR /app
EXPOSE 80
FROM microsoft/aspnetcore-build:2.0 AS builder
WORKDIR /src
COPY WebApplication1.sln ./
COPY WebApplication1/WebApplication1.csproj Web/
RUN dotnet restore
COPY . .
WORKDIR /src/Web
RUN dotnet build -c Release -o /app
FROM builder AS publish
RUN dotnet publish -c Release -o /app
FROM base AS production
WORKDIR /app
COPY --from=publish /app .
ENTRYPOINT ["dotnet", "WebApplication1.dll"]