Docker Containerization Best Practices

Docker Fundamentals

Docker has revolutionized application deployment by providing a consistent environment across development, testing, and production.

Best Practices

• Use multi-stage builds
• Keep images small
• Use .dockerignore
• Don't run as root
• Use specific tags

Example Dockerfile

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
EXPOSE 3000
CMD ["node", "server.js"]

Following these practices ensures secure and efficient containerized applications.