Containerization With Docker: Modern Deployment for Developers

Docker packages applications into lightweight containers for consistent runtime environments across development and production.

Best practices

• Use small base images (alpine where appropriate)
• Keep layers minimal and cache-friendly
• Pin versions and scan images for vulnerabilities

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --production
COPY . .
CMD ["node","index.js"]