Add Docker Buildx support to build images for both linux/amd64 and linux/arm64 architectures using a single workflow. This enables deployment to ARM-based systems (e.g., Raspberry Pi, Apple Silicon) without separate builds.
Changes:
- Add Docker Buildx setup step to both backend and frontend jobs
- Replace single-arch 'docker build' with multi-arch 'docker buildx build'
- Configure '--platform linux/amd64,linux/arm64' for both architectures
- Consolidate tag and push operations into single buildx command
- Update evidence capture to include platform information
- Update release summary to indicate multi-arch images
Images will now be published as manifest lists containing both AMD64 and ARM64 variants under the same tags.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
- Remove 'Configure insecure registry' step from both backend and frontend jobs
- systemctl not available in Gitea Actions container environment
- Runner host must be pre-configured with insecure registry support
- Fixes: System has not been booted with systemd error
- Add Docker daemon configuration step to both backend and frontend jobs
- Configure insecure-registries to allow HTTP connections to registry
- Restart Docker daemon and verify configuration
- Resolves HTTP error when pushing to HTTP-only registry at 192.168.241.13:8080
