🔐 JWT Authentication with React & Node.js

A simple and secure full-stack authentication system using Node.js + Express + JWT (backend).

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✅ Features

• 🔐 JSON Web Token (JWT) based authentication
• 🧍 User registration & login
• 🛡️ Protected routes (frontend & backend)
• 🔁 Token refresh (optional)
• 💾 MongoDB for user data (via Mongoose)
• 🧑‍💻 Clean, modular codebase for easy understanding

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🧪 How It Works

1. User signs up → Backend saves user in DB (hashed password).
2. On login → Backend returns JWT token.
3. Token is stored in localStorage or HTTP-only cookies.
4. Frontend uses token to access protected routes.
5. (Optional) Refresh token system for prolonged sessions.

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📄 License

MIT © 2025 Aozora

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