Dockerfile

# escape=`

ARG REPO=mcr.microsoft.com/dotnet/runtime

# Installer image
FROM mcr.microsoft.com/windows/servercore:ltsc2025-amd64 AS installer

# Install ASP.NET Core Runtime
RUN powershell -Command `
        $ErrorActionPreference = 'Stop'; `
        $ProgressPreference = 'SilentlyContinue'; `
        `
        $aspnetcore_version = '9.0.2'; `
        Invoke-WebRequest -OutFile aspnetcore.zip https://builds.dotnet.microsoft.com/dotnet/aspnetcore/Runtime/$aspnetcore_version/aspnetcore-runtime-$aspnetcore_version-win-x64.zip; `
        $aspnetcore_sha512 = '0a5b0d4a0ac65dc0b11b104154143ef310e47b3aa92dbff32e7002d1ea6005b6444a6699eb03a5c728326c6ad97234a1fc9607972a133130727173247111472e'; `
        if ((Get-FileHash aspnetcore.zip -Algorithm sha512).Hash -ne $aspnetcore_sha512) { `
            Write-Host 'CHECKSUM VERIFICATION FAILED!'; `
            exit 1; `
        }; `
        `
        mkdir dotnet/shared/Microsoft.AspNetCore.App; `
        tar -oxzf aspnetcore.zip -C dotnet ./shared/Microsoft.AspNetCore.App; `
        Remove-Item -Force aspnetcore.zip


# ASP.NET Core image
FROM $REPO:9.0.2-nanoserver-ltsc2025

# ASP.NET Core version
ENV ASPNET_VERSION=9.0.2

COPY --from=installer ["/dotnet/shared/Microsoft.AspNetCore.App", "/Program Files/dotnet/shared/Microsoft.AspNetCore.App"]