Added flexible user/group ID handling to support different storage backends:
- Configurable PUID/PGID environment variables for NFS and local storage
- RUN_AS_ROOT mode for SMB mounts that only allow root writes
- Pre-chown app files during build to enable non-root rsync
- Improved error messages with troubleshooting guidance
- Updated documentation with setup examples for different scenarios
This allows the container to work correctly with Unraid SMB shares, NFS mounts,
and local storage by adapting to how different filesystems handle permissions.
Default behavior (PUID=99, PGID=100) remains compatible with Unraid nobody:users.
- Minimal Dockerfile with Python 3.11 and required dependencies
- docker-entrypoint.sh initializes folder structure and settings
- README-DOCKER.md with simple build and run instructions
- Updated .gitignore to exclude Docker test data
