Add QEMU and multi-platform build (linux/amd64 + linux/arm64) to
GitHub Actions workflow, enabling self-hosting on Raspberry Pi and
other ARM64 devices.
Builds and pushes to ghcr.io/ulsklyc/oikos on every push to main
and on version tags. Tags: branch name, semver, short SHA.
Uses Docker layer caching via GitHub Actions cache.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>