1# Install dotnet SDK 2ENV DOTNET_SDK_VERSION 2.1.500 3RUN curl -sSL -o dotnet.tar.gz https://dotnetcli.blob.core.windows.net/dotnet/Sdk/$DOTNET_SDK_VERSION/dotnet-sdk-$DOTNET_SDK_VERSION-linux-x64.tar.gz ${'\\'} 4 && mkdir -p /usr/share/dotnet ${'\\'} 5 && tar -zxf dotnet.tar.gz -C /usr/share/dotnet ${'\\'} 6 && rm dotnet.tar.gz ${'\\'} 7 && ln -s /usr/share/dotnet/dotnet /usr/bin/dotnet 8 9 10# Install .NET Core 1.1.10 runtime (required to run netcoreapp1.1) 11RUN curl -sSL -o dotnet_old.tar.gz https://dotnetcli.blob.core.windows.net/dotnet/Runtime/1.1.10/dotnet-debian.9-x64.1.1.10.tar.gz ${'\\'} 12 && mkdir -p dotnet_old ${'\\'} 13 && tar zxf dotnet_old.tar.gz -C dotnet_old ${'\\'} 14 && cp -r dotnet_old/shared/Microsoft.NETCore.App/1.1.10/ /usr/share/dotnet/shared/Microsoft.NETCore.App/ ${'\\'} 15 && rm -rf dotnet_old/ dotnet_old.tar.gz 16RUN apt-get update && apt-get install -y libunwind8 && apt-get clean 17 18 19# Trigger the population of the local package cache 20ENV NUGET_XMLDOC_MODE skip 21RUN mkdir warmup ${'\\'} 22 && cd warmup ${'\\'} 23 && dotnet new ${'\\'} 24 && cd .. ${'\\'} 25 && rm -rf warmup 26