Uses a matrix strategy with Go cross-compilation (GOARCH + CARCH) so both architectures build in the same amd64 container. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
archlinux:latest has no ARM64 image on Docker Hub. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>