README.VERCEL.md

Deploying to Vercel

1. Install the Vercel CLI and login:

npm i -g vercel
vercel login

2. Add your CoinGecko API key to Vercel (optional but recommended):

vercel env add COINGECKO_API_KEY production

3. Deploy:

vercel --prod

Notes:

• This project uses a serverless endpoint at /api/prices which queries CoinGecko on demand.
• Socket.io (server sockets) is not used because serverless functions are ephemeral; the client polls /api/prices every 10s instead.
• If you need persistent WebSockets or a single long-lived server process, deploy server/index.js to a VM-like host (Render, Fly, Railway) instead.