Docker (Node.js Containerization)

Overview

Docker enables consistent environments for Node.js applications across development, testing, and production. Multi-stage builds reduce image size, docker-compose simplifies local development.

Base Image: node:20-alpine (recommended for small size)
Use case: Deploy TypeScript APIs, ensure consistent environments

Key Benefit: "Works on my machine" → "Works everywhere"

When to Use This Skill

✅ Use Docker when:

• Deploying to cloud (AWS, GCP, Azure)
• Need consistent dev environment across team
• Running CI/CD pipelines
• Deploying with Kubernetes
• Need isolated PostgreSQL/Redis for development