- Optimize Dockerfile layer caching with --mount=type=cache for Go modules and npm
- Reorganize Dockerfile layers for better cache hit rates
- Improve .dockerignore organization with categorized comments
- Add Makefile targets: up, down, rebuild-app, restart, ps
- Enhance Makefile help output with categorized sections
- Rename project from 'bookmann' to 'shelf'
- Move all backend/ contents to root level (flatten structure)
- Update Go module name from 'bookmann' to 'shelf'
- Update all import paths to use new 'shelf' module
- Update Dockerfile to work without backend/ subdirectory
- Update docker-compose.yml to use new structure and rename containers
- Update .gitignore for new file paths
- Update README.md with new project name and structure
- Regenerate database code with new module imports