Dockerfile

ARG REPO=mcr.microsoft.com/dotnet/aspnet
FROM $REPO:5.0-buster-slim-arm32v7

ENV \
    # Unset ASPNETCORE_URLS from aspnet base image
    ASPNETCORE_URLS= \
    DOTNET_SDK_VERSION=5.0.102 \
    # Enable correct mode for dotnet watch (only mode supported in a container)
    DOTNET_USE_POLLING_FILE_WATCHER=true \
    # Skip extraction of XML docs - generally not useful within an image/container - helps performance
    NUGET_XMLDOC_MODE=skip \
    # PowerShell telemetry for docker image usage
    POWERSHELL_DISTRIBUTION_CHANNEL=PSDocker-DotnetSDK-Debian-10-arm32

RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        curl \
        git \
        procps \
        wget \
    && rm -rf /var/lib/apt/lists/*

# Install .NET SDK
RUN curl -SL --output dotnet.tar.gz https://dotnetcli.azureedge.net/dotnet/Sdk/$DOTNET_SDK_VERSION/dotnet-sdk-$DOTNET_SDK_VERSION-linux-arm.tar.gz \
    && dotnet_sha512='23610a4193d8116109aaeebefa0bf023808f86d3e0a8ba52b89aa5b4b869385a5e57fc8458ff12f9ea8f359f6978498d47fd80d073ab79b2a7dfbc103b8ff903' \
    && echo "$dotnet_sha512 dotnet.tar.gz" | sha512sum -c - \
    && mkdir -p /usr/share/dotnet \
    && tar -C /usr/share/dotnet -oxzf dotnet.tar.gz ./packs ./sdk ./templates ./LICENSE.txt ./ThirdPartyNotices.txt \
    && rm dotnet.tar.gz \
    # Trigger first run experience by running arbitrary cmd
    && dotnet help

# Install PowerShell global tool
RUN powershell_version=7.1.1 \
    && curl -SL --output PowerShell.Linux.arm32.$powershell_version.nupkg https://pwshtool.blob.core.windows.net/tool/$powershell_version/PowerShell.Linux.arm32.$powershell_version.nupkg \
    && powershell_sha512='95dd1e28c86856ffa96f6e4b6a1f9e4f1b1703e9ad29216f6b12c4a780b919422afc6233e3879c15b868c4feef018630cc14c604af6c75d13fa91807beaa4d20' \
    && echo "$powershell_sha512  PowerShell.Linux.arm32.$powershell_version.nupkg" | sha512sum -c - \
    && mkdir -p /usr/share/powershell \
    && dotnet tool install --add-source / --tool-path /usr/share/powershell --version $powershell_version PowerShell.Linux.arm32 \
    && dotnet nuget locals all --clear \
    && rm PowerShell.Linux.arm32.$powershell_version.nupkg \
    && ln -s /usr/share/powershell/pwsh /usr/bin/pwsh \
    && chmod 755 /usr/share/powershell/pwsh \
    # To reduce image size, remove the copy nupkg that nuget keeps.
    && find /usr/share/powershell -print | grep -i '.*[.]nupkg$' | xargs rm