🔐 Login & Registration System A full-stack authentication system built with:

Frontend: React

Backend: Node.js + Express

Database: Local JSON File (users.json)

Authentication: JWT

Password Hashing: Bcrypt

Deployment: Frontend on Render | Backend on Render

📌 Features ✅ User Registration with email, username & hashed password

✅ User Login with JWT token authentication

✅ Protected route (/profile) accessible with valid token

✅ Responsive UI with form validations

✅ Local JSON file used as a database

✅ Frontend-backend integration using Axios

✅ CORS-secured backend

✅ Fully deployed online

Live Demo 🔗 Frontend: https://registrationlogin-frontend.onrender.com

🔗 Backend: https://registrationlogin-backend.onrender.com

🛠️ Technologies Used 🔹 Frontend (React) React + Axios

React Hooks (useState, useEffect)

React Router

LocalStorage for token management

Responsive design with CSS

🔹 Backend (Node.js + Express) Express.js

bcrypt for password hashing

jsonwebtoken (JWT) for authentication

cors for secure API access

dotenv for environment variables

fs module for reading/writing local JSON file