Backend implementaiton

[iamankit083]

📋 Pull Request Description

This PR implements a full-stack backend for the app, replacing local JSON file storage with a cloud database. Resolves #8.

🔄 Type of Change

• ✨ New feature (non-breaking change which adds functionality)
• 🔨 Refactor (code improvement without changing functionality)
• 📚 Documentation update

📝 Changes Made

Backend (new)

• Added Express.js REST API with full CRUD for pastes
• Added MongoDB Atlas integration via Mongoose
• Added JWT-based authentication (signup, login, protected routes)
• Added Mongoose schemas for User and Paste
• Added bcryptjs for password hashing
• Added backend .env.example and .gitignore

Frontend (updated)

• Replaced Redux local state with API calls to the backend
• Added src/config.js for centralized API URL management
• Frontend now uses VITE_API_URL env variable — works locally and in production
• Added Login and Signup pages
• Added protected routes with JWT token
• Added dark mode toggle
• Added .env.example and .gitignore for frontend
• Updated README with full-stack setup instructions

🔗 Related Issue

closes #8

[vercel]

@iamankit083 is attempting to deploy a commit to the vinayboss81265's projects Team on Vercel.

A member of the Team first needs to authorize it.

[VinayKumar42]

@iamankit083
Was this issue assigned to you? Why did you directly create a pull request

[iamankit083]

You had mentioned “Go for it @iamankit083” on the issue earlier, so I assumed I could proceed with the implementation. Based on that, I worked on the backend feature and created this PR.

[VinayKumar42]

First create the PR, and after it gets assigned, then this PR can be merged. Without assignment, this PR has no meaning.