Project Title: Fix Vercel Deployment Errors (404) – React + Next.js Serverless + Supabase (Razorpay Issue)

Project Description: My website works perfectly on localhost (frontend, admin panel, APIs, and payment flow), but when I deploy it on Vercel, I start getting multiple errors, especially 404 errors and payment issues. I need the live site to function exactly the same as it does on localhost without breaking any features. Tech Stack: - Frontend: React (Vite) - Backend: [login to view URL] Serverless APIs - Database: Supabase - Payment Gateway: Razorpay + Manual UPI - Admin Panel: Custom admin dashboard - Hosting: Vercel Current Issues on Live (Vercel): - API routes returning 404 errors (e.g. /api/orders, /api/products, /api/health) - Admin panel routes showing 404 on deployed domain - Razorpay works perfectly on localhost but does NOT work on the live site - Pincode API and some serverless functions fail on production - Some API routes return HTML instead of JSON - Possible environment variable and routing configuration issues - Cross-origin and proxy-related problems after deployment What I Need: - Complete debugging of Vercel deployment - Fix all 404 errors (frontend + API routes) - Configure proper routing ([login to view URL], rewrites, redirects) - Fix Razorpay integration on live site (it works on localhost but not in production) - Ensure all serverless APIs work exactly like localhost - Proper setup of environment variables (Supabase, Razorpay keys, Admin API key) - Fix CORS, proxy, and production API handling issues - Make admin panel, orders, and payment system fully functional on the live domain Important Requirement: I want the website to be fully working on the live domain exactly like it works on localhost. No features should break, including admin panel, orders, APIs, and payment flow. Access I Can Provide: - GitHub repository - Vercel project access - Supabase access (if needed) - Environment variables and configuration details Preferred Freelancer: - Strong experience with Vercel deployments - Expert in [login to view URL] serverless functions and API routing - Experience with Supabase integration - Razorpay payment gateway debugging experience Budget: Open (Looking for a cost-effective solution) Timeline: Urgent (1–3 days preferred) Note: The website is already built. I do NOT need new development. I only need an expert to fix deployment, routing, API, and Razorpay issues so the live site works 100% like localhost.

Project ID: 40232186