Add GitHub Actions workflow that builds linux/amd64 + linux/arm64
images via buildx + QEMU and pushes to ghcr.io/zhangtianyao1/teamspeak-music-bot
on v*.*.* tag pushes (or manual dispatch). Switch docker-compose.yml
to pull the prebuilt image so NAS / non-build environments can deploy
without a local toolchain.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
