multiarch build

[hoodnoah]

MultiArch builds are currently difficult to implement with Dotnet 7.0+.

QEMU is incompatible with Dotnet 7.0, and therefore the settings must be made within the dockerfile itself.

However, there are currently incompatibilities between architecture names expected by Dotnet and provided by the Docker runtimes, e.g. docker expects linux/arm64 and Dotnet expects something like linux-arm64.

See this issue for more details.

See this issue for an example Dockerfile which should work once the changes are backported to Dotnet 7.0.