Add Flutter-based dashboard to replace Organizr:
- Port 8092, stateless static web app via nginx
- Resource limits (128M/32M), wget-based healthcheck
- Documented in CONTAINERS.md with full service profile
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
