- Add sync-server/ with Node.js WebSocket relay server
- Server handles join/leave/location/waypoint messages
- Auto-cleans stale participants (1hr) and empty rooms (24hr)
- Dockerized with Traefik labels for easy deployment
- Update .env.example with NEXT_PUBLIC_SYNC_URL
- Mark task-5 as Done in backlog
Deployed to https://sync.rmaps.online🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Jeff Emmett