• Never commit sensitive data to version control
• Use environment variables for all sensitive configuration
• Rotate secrets regularly in production

• Change default passwords immediately after first login
• Use strong passwords with special characters, numbers, and mixed case
• Limit admin access to trusted personnel only
• Monitor admin activities through audit logs

• Use MongoDB Atlas or secure MongoDB instances
• Enable authentication and authorization
• Use connection strings with proper credentials
• Regular backups and monitoring

• JWT tokens with secure secrets
• Rate limiting to prevent abuse
• Input validation on all endpoints
• CORS protection for cross-origin requests
• Helmet security headers

• Sandboxed execution environment
• Timeout protection against infinite loops
• Resource monitoring and cleanup
• Input sanitization for user code

• Change all default passwords
• Set strong JWT secrets
• Configure secure MongoDB connection
• Enable HTTPS/SSL certificates
• Set up proper CORS origins
• Configure rate limiting
• Remove debug logs and console statements
• Set up monitoring and alerting
• Create admin user with secure credentials
• Test all security measures

• Update dependencies regularly
• Monitor for security vulnerabilities
• Review and rotate secrets
• Audit user permissions
• Monitor system logs
• Backup data regularly
• Test disaster recovery procedures

# JWT Configuration
JWT_SECRET=your-super-secure-jwt-secret-key-here
JWT_EXPIRE=7d

# Database Security
MONGODB_URI=mongodb://username:password@host:port/database

# CORS Security
CORS_ORIGIN=https://your-frontend-domain.com

# Rate Limiting
RATE_LIMIT_WINDOW_MS=900000
RATE_LIMIT_MAX_REQUESTS=100

# Admin Account (Optional - for initial setup)
ADMIN_USERNAME=admin
ADMIN_EMAIL=admin@yourdomain.com
ADMIN_PASSWORD=secure-admin-password

• JWT-based authentication
• Role-based access control (RBAC)
• Password hashing with bcrypt
• Session management
• Protected routes

• Express validator middleware
• Sanitization of user inputs
• File upload restrictions
• Code execution limits

• Rate limiting per IP
• CORS protection
• Helmet security headers
• Request size limits
• Error handling without sensitive data exposure

• Sandboxed execution environment
• Timeout protection
• Resource monitoring
• Memory limits
• Process isolation

1. Immediately change all admin passwords
2. Review access logs for suspicious activity
3. Rotate JWT secrets to invalidate all tokens
4. Check database for unauthorized changes
5. Monitor system for ongoing threats
6. Update dependencies to latest secure versions
7. Notify users if personal data affected

• System Administrator: [Your Contact]
• Database Administrator: [Your Contact]
• Security Team: [Your Contact]

Remember: Security is an ongoing process, not a one-time setup!