Real-Time Collaborative Whiteboard

TypeScript-based collaborative whiteboard with:

• Next.js frontend (Canvas + optimistic rendering)
• Express + Socket.io backend (room isolation + heartbeat/reconnect support)
• Redis Pub/Sub adapter for horizontal scale
• Docker Compose for environment parity

Quick start

1. Install dependencies:
   • npm install
2. Start Redis + backend + frontend:
   • docker compose up --build
3. Open:
   • http://localhost:3000

Local development without Docker

• In one terminal: npm run dev --workspace server
• In another: npm run dev --workspace web

Ensure Redis is available at redis://localhost:6379.