How to Create and Deploy a Node.js Application

Node.js has become one of the most widely used runtime environments for building server-side applications. Whether you're building a REST API, a real-time chat app, or a lightweight web server, understanding how to create and deploy a Node.js project is a foundational skill in modern web development.

What Is Node.js and Why It Matters

Node.js is a JavaScript runtime built on Chrome's V8 engine. It lets you run JavaScript on the server — outside the browser — which means you can use one language across both frontend and backend code.

Its event-driven, non-blocking I/O model makes it well-suited for applications that handle many concurrent connections, such as APIs, streaming services, and real-time tools. Node.js is not a framework; it's the platform. Frameworks like Express, Fastify, and NestJS are built on top of it.

Creating a Node.js Application

Step 1: Install Node.js

Download Node.js from the official site. Two release tracks are available:

• LTS (Long-Term Support): Stable, recommended for most projects
• Current: Latest features, less stable for production

After installation, confirm it's working: