📇 Contact Management System (Node.js + Express + MongoDB)

A secure and modular backend API for managing user contact information. Built using Node.js, Express.js and MongoDB with user authentication via JWT.

🔧 Features

• User registration and login
• Token-based authentication and authorization (JWT)
• Secure password hashing with bcrypt
• Create, Read, Update and Delete (CRUD) operations for contacts
• Middleware for error handling and access control
• Environment variable configuration using .env
• MVC structure with Express Router and Controllers

📂 Tech Stack

• Backend: Node.js, Express.js
• Database: MongoDB, Mongoose
• Authentication: JWT, bcrypt
• Version Control: Git & GitHub
• Other Tools: Postman (for API testing), dotenv