JavaScript (Node.js) and Docker: Containerizing Applications

This book is a practical guide for JavaScript developers who want to master application containerization using Docker. You will learn how to package Node.js applications into lightweight, isolated containers that can run anywhere: from a local developer machine to a production server in the cloud.

What the book covers

The book covers the full lifecycle of working with Docker in the context of Node.js:

• Docker Basics: installation, basic commands, working with Dockerfile and docker-compose.yml.
• Creating Optimized Images: multi-stage builds, minimizing image size, managing dependencies (npm, yarn).
• Working with the Environment: environment variables, .env files, passing configurations into the container.
• Networking and Data Storage: port forwarding, volumes, working with databases (MongoDB, PostgreSQL) in containers.
• Microservice Architecture: splitting a monolithic application into microservices, communication between containers.
• DevOps Practices: setting up CI/CD (GitHub Actions, GitLab CI), deploying to VPS/cloud platforms, monitoring and logging.
• Advanced Topics: orchestration with Docker Swarm, working with Docker Compose for development, container security.

Who this book is for

• JavaScript/Node.js developers who want to simplify deploying their projects.
• Beginner DevOps engineers focusing on the JavaScript ecosystem.
• Freelancers and startup owners looking to automate build and deployment processes.
• Students and IT professionals transitioning into modern development.

What you will learn

After reading, you will be able to:

• Write efficient Dockerfiles for Node.js applications.
• Set up local development with hot reloading using Docker Compose.
• Configure automatic build and deployment on every push to the repository.
• Scale the application using multiple containers and load balancers.
• Avoid common mistakes related to layer caching, permissions, and memory leaks.

The book contains many ready-to-use code examples that can be immediately applied in real projects. All examples are tested on current versions of Node.js 18+ and Docker 24+. Suitable for both beginners and experienced developers looking to systematize their knowledge.