Container orchestration (Docker Compose / Kubernetes later)

Setup containerization using Docker for the entire application stack.

Requirements:

• Create Dockerfile for Node.js backend
• Create docker-compose.yml for multi-container setup (API, DB, Redis, etc.)
• Add .dockerignore file
• Configure environment-specific docker-compose files
• Add health checks in container configurations
• Document container setup and running instructions

Deliverables:

• Dockerfile for backend
• docker-compose.yml with all services
• .dockerignore file
• README with container setup instructions
• Verified builds and running containers