Deploy Fastify to Vercel · Yogyy

Vercel provides zero-configuration deployment for Node.js applications. To use it now, it is as simple as configuring your vercel.json file like the following:

{
    "rewrites": [
        {
            "source": "/(.*)",
            "destination": "/api/serverless.js"
        }
    ]
}

Then, write api/serverless.js like so:

'use strict';
 
// Read the .env file.
import * as dotenv from 'dotenv';
dotenv.config();
 
// Require the framework
import Fastify from 'fastify';
 
// Instantiate Fastify with some config
const app = Fastify({
  logger: true,
});
 
// Register your application as a normal plugin.
app.register(import('../app.js'));
 
export default async (req, res) => {
  await app.ready();
  app.server.emit('request', req, res);
};