Unlock the full potential of Node.js for modern web development with this comprehensive handbook to developing applications and services.The book will cover the fundamentals to advanced techniques, and explore the intricacies of building powerful applications. You will master Express server creation, develop RESTful APIs with efficient routing, and dive into MongoDB for seamless data persistence.It will uncover the nuances of template engines, middleware, and robust authentication methods. Leverage Socket.IO for real-time capabilities and adeptly handle errors with effective logging. The projects will double as versatile boilerplates for kickstarting your own development endeavors.In the later chapter, you will learn Test-Driven Development with Mocha, gain insights into debugging, and perfect the art of building and deploying Node.js applications.Each example in the book adheres to common best practices, providing valuable insights to help you avoid common pitfalls. Designed as both a learning resource and a reference guide, this book equips you with the knowledge to tackle challenging problems at any stage of development.Table of Contents1. Getting Started with Node.js2. Deep Dive into Node.js3. Introducing Express.js4. Creating REST API and Routing5. Working with MongoDB6. Data Persistence7. Template Engines8. Middleware Functions9. Authentication and Authorization10. Socket.IO11. Handling and Logging Errors12. TDD with Mocha and Chai13. Debugging14. Build and Deployments15. Future Scope