GitHub Actions cache (type=gha) is not available in Gitea, causing timeout errors.
Replaced with registry-based cache which works with any container registry.
Changes:
- Backend: cache-from/to type=registry,ref=backend:buildcache
- Frontend: cache-from/to type=registry,ref=frontend:buildcache
- Removed debug step that's no longer needed
This allows Docker layer caching while maintaining Gitea compatibility.
Images are successfully being pushed to rg.fr-par.scw.cloud/weworkstudio
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Fixed invalid Docker tag format errors:
- Removed :preprod suffix from base image names in metadata action
- docker/metadata-action already adds branch-based tags automatically
- Unified registry to rg.fr-par.scw.cloud/weworkstudio for both backend and frontend
- This fixes "invalid reference format" error
Before: backend:preprod:preprod (invalid - duplicate tags)
After: backend:preprod (valid)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
