Sujitkarad · Jul 8, 2026
diff --git a/API_DOCUMENTATION.md b/API_DOCUMENTATION.md
diff --git a/PROJECT_SUMMARY.md b/PROJECT_SUMMARY.md
diff --git a/SETUP_GUIDE.md b/SETUP_GUIDE.md
@@ -0,0 +1,282 @@
+# Internship Training App - Setup Guide
+
+## Quick Start
+
+### Prerequisites
+- Node.js v18+
+- MongoDB (local or Atlas)
+- npm or yarn
+
+### Step 1: Backend Setup
+
+```bash
+# Navigate to backend directory
+cd backend
+
+# Install dependencies
+npm install
+
+# Create .env file (copy from .env.example)
+cp .env.example .env
+
+# Edit .env with your MongoDB URI and other configurations
+# For local MongoDB:
+# MONGODB_URI=mongodb://localhost:27017/internship-training
+
+# Start the backend server
+npm run dev
+```
+
+The backend API will be available at `http://localhost:5000`
+
+### Step 2: Frontend Setup
+
+```bash
+# Navigate to frontend directory (in a new terminal)
+cd frontend
+
+# Install dependencies
+npm install
+
+# Create .env file (copy from .env.example)
+cp .env.example .env
+
+# Start the frontend development server
+npm run dev
+```
+
+The frontend will be available at `http://localhost:3000`
+
+## Running with Docker
+
+```bash
+# From the root directory
+docker-compose up --build
+
+# Stops services
+docker-compose down
+```
+
+## Database Setup
+
+### Option 1: Local MongoDB
+
+```bash
+# Install MongoDB Community Edition
+# On macOS with Homebrew:
+brew tap mongodb/brew
+brew install mongodb-community
+
+# Start MongoDB
+brew services start mongodb-community
+
+# Verify connection
+mongosh
+```
+
+### Option 2: MongoDB Atlas (Cloud)
+
+1. Go to https://www.mongodb.com/cloud/atlas
+2. Create a free account
+3. Create a cluster
+4. Get connection string
+5. Update MONGODB_URI in backend .env file
+
+## Seed Data
+
+To populate the database with initial data:
+
+```bash
+cd backend
+npm run seed
+```
+
+This will create:
+- 3 Career paths
+- 6 Courses
+- Modules and lessons for each course
+- Sample quiz questions
+
+## API Testing
+
+### Using cURL
+
+```bash
+# Register
+curl -X POST http://localhost:5000/api/auth/register \
+  -H "Content-Type: application/json" \
+  -d '{
+    "email": "user@example.com",
+    "password": "password123",
+    "firstName": "John",
+    "lastName": "Doe"
+  }'
+
+# Login
+curl -X POST http://localhost:5000/api/auth/login \
+  -H "Content-Type: application/json" \
+  -d '{
+    "email": "user@example.com",
+    "password": "password123"
+  }'
+
+# Get careers (no auth required)
+curl http://localhost:5000/api/careers
+
+# Get current user (requires token)
+curl -H "Authorization: Bearer YOUR_TOKEN" \
+  http://localhost:5000/api/auth/me
+```
+
+### Using Postman
+
+1. Import the provided Postman collection
+2. Set the `BASE_URL` variable to `http://localhost:5000`
+3. Use the token from login response for authenticated endpoints
+
+## Development Workflow
+
+### Backend Development
+
+```bash
+# Start development server with hot reload
+npm run dev
+
+# Build TypeScript
+npm run build
+
+# Run tests
+npm run test
+
+# Lint code
+npm run lint
+```
+
+### Frontend Development
+
+```bash
+# Start development server
+npm run dev
+
+# Build for production
+npm run build
+
+# Run tests
+npm run test
+```
+
+## Troubleshooting
+
+### MongoDB Connection Failed
+- Ensure MongoDB is running
+- Check MONGODB_URI in .env
+- Verify connection string format
+
+### CORS Errors
+- Check CORS_ORIGIN in backend .env
+- Ensure frontend URL matches CORS_ORIGIN
+- Verify backend is running on the correct port
+
+### Port Already in Use
+```bash
+# Backend (5000)
+lsof -i :5000
+kill -9 <PID>
+
+# Frontend (3000)
+lsof -i :3000
+kill -9 <PID>
+```
+
+### Token Expired
+- Clear browser localStorage
+- Login again to get a new token
+
+## Performance Tips
+
+1. **Database Indexing**: Ensure MongoDB indexes are created for:
+   - users.email
+   - enrollments.user + enrollments.course
+   - progress.user + progress.course
+
+2. **Caching**: Implement Redis for caching:
+   - Career listings
+   - Course metadata
+   - User sessions
+
+3. **Pagination**: All list endpoints support pagination
+   - Use `?page=1&limit=20` parameters
+
+4. **Lazy Loading**: Frontend components implement code splitting
+   - Routes are lazy loaded
+   - Components use React.lazy()
+
+## Deployment
+
+### Backend Deployment (Heroku)
+
+```bash
+# Install Heroku CLI
+npm install -g heroku
+
+# Login to Heroku
+heroku login
+
+# Create app
+heroku create your-app-name
+
+# Set environment variables
+heroku config:set JWT_SECRET=your_secret_key
+heroku config:set MONGODB_URI=your_mongodb_uri
+
+# Deploy
+git push heroku main
+```
+
+### Frontend Deployment (Vercel)
+
+```bash
+# Install Vercel CLI
+npm i -g vercel
+
+# Deploy
+vercel
+```
+
+### Docker Deployment (AWS, GCP, Azure)
+
+1. Build Docker images
+2. Push to registry
+3. Deploy using container orchestration
+
+## Security Checklist
+
+- [ ] Change JWT_SECRET before production
+- [ ] Use HTTPS in production
+- [ ] Set secure cookies
+- [ ] Implement rate limiting
+- [ ] Add request validation
+- [ ] Use environment variables for secrets
+- [ ] Enable CORS only for trusted domains
+- [ ] Implement password strength requirements
+- [ ] Add two-factor authentication
+- [ ] Regular security audits
+
+## Support
+
+For issues or questions:
+1. Check documentation
+2. Search existing issues
+3. Create a new issue with:
+   - Detailed description
+   - Steps to reproduce
+   - Error messages
+   - Environment details
+
+## Additional Resources
+
+- [Express.js Documentation](https://expressjs.com)
+- [React Documentation](https://react.dev)
+- [MongoDB Documentation](https://docs.mongodb.com)
+- [TypeScript Documentation](https://www.typescriptlang.org/docs)
+- [Tailwind CSS Documentation](https://tailwindcss.com/docs)
diff --git a/backend/.env.example b/backend/.env.example
@@ -0,0 +1,24 @@
+# Database
+MONGODB_URI=mongodb://localhost:27017/internship-training
+MONGODB_TEST_URI=mongodb://localhost:27017/internship-training-test
+
+# Server
+PORT=5000
+NODE_ENV=development
+
+# JWT
+JWT_SECRET=your_jwt_secret_key_change_in_production
+JWT_EXPIRATION=7d
+
+# CORS
+CORS_ORIGIN=http://localhost:3000
+
+# File Upload
+MAX_FILE_SIZE=10485760
+UPLOAD_DIR=./uploads
+
+# Email (optional)
+SMTP_HOST=smtp.example.com
+SMTP_PORT=587
+SMTP_USER=your_email@example.com
+SMTP_PASSWORD=your_password
diff --git a/backend/Dockerfile b/backend/Dockerfile
@@ -0,0 +1,15 @@
+FROM node:18-alpine
+
+WORKDIR /app
+
+COPY package*.json ./
+
+RUN npm install
+
+COPY . .
+
+RUN npm run build
+
+EXPOSE 5000
+
+CMD ["npm", "start"]
diff --git a/backend/package.json b/backend/package.json
@@ -0,0 +1,48 @@
+{
+  "name": "internship-training-backend",
+  "version": "1.0.0",
+  "description": "Backend API for Internship Training App",
+  "main": "src/server.ts",
+  "scripts": {
+    "dev": "nodemon src/server.ts",
+    "build": "tsc",
+    "start": "node dist/server.js",
+    "lint": "eslint src --ext .ts",
+    "test": "jest",
+    "seed": "ts-node src/seeds/seed.ts"
+  },
+  "keywords": [
+    "internship",
+    "training",
+    "api"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "express": "^4.18.2",
+    "mongoose": "^7.0.0",
+    "dotenv": "^16.0.3",
+    "bcryptjs": "^2.4.3",
+    "jsonwebtoken": "^9.0.0",
+    "cors": "^2.8.5",
+    "helmet": "^7.0.0",
+    "express-validator": "^7.0.0",
+    "multer": "^1.4.5-lts.1",
+    "axios": "^1.4.0"
+  },
+  "devDependencies": {
+    "@types/express": "^4.17.17",
+    "@types/node": "^20.0.0",
+    "@types/bcryptjs": "^2.4.2",
+    "@types/jsonwebtoken": "^9.0.2",
+    "typescript": "^5.0.0",
+    "nodemon": "^2.0.22",
+    "ts-node": "^10.9.1",
+    "eslint": "^8.40.0",
+    "@typescript-eslint/eslint-plugin": "^5.59.0",
+    "@typescript-eslint/parser": "^5.59.0",
+    "jest": "^29.5.0",
+    "@types/jest": "^29.5.0",
+    "ts-jest": "^29.1.0"
+  }
+}
diff --git a/backend/src/config/database.ts b/backend/src/config/database.ts
@@ -0,0 +1,23 @@
+import mongoose from 'mongoose';
+import { logger } from '../utils/logger';
+
+export const connectDB = async (): Promise<void> => {
+  try {
+    const uri = process.env.MONGODB_URI || 'mongodb://localhost:27017/internship-training';
+    await mongoose.connect(uri);
+    logger.info('MongoDB connected successfully');
+  } catch (error) {
+    logger.error('MongoDB connection failed', error);
+    throw error;
+  }
+};
+
+export const disconnectDB = async (): Promise<void> => {
+  try {
+    await mongoose.disconnect();
+    logger.info('MongoDB disconnected');
+  } catch (error) {
+    logger.error('MongoDB disconnection failed', error);
+    throw error;
+  }
+};