{"success":true,"message":"Welcome to Expressify.ai Backend API","version":"1.0.0","documentation":"/api-docs","endpoints":{"auth":"/api/auth","googleAuth":"/api/auth/google","authExample":"/google-auth-example.html"},"features":["JWT Authentication","Google OAuth Integration","Customer Management","AI-Powered Chatbot","Real-time Email Sync","Analytics & Monitoring","Secure API Design","Rate Limiting Protection"],"rateLimits":{"general":"200 requests per 5 minutes","auth":"5 requests per 15 minutes","chat":"30 requests per minute"}}