Fix: Bundle Size Exceeded Worker Limit in Fastify on Vercel

To fix this issue, you need to optimize your Fastify application bundle. One way to achieve this is by using the `--minify` flag with the `fastify` command to minify the code. Additionally, you can use a plugin like `@fastify/swagger` with the `exposeRoute` option set to `false` to reduce the bundle size. You can also consider using Vercel's `vercel build` command with the `--optimize` flag to optimize the build process. Here's an example of how you can modify your `vercel.json` file to include these optimizations: 
{
  "version": 2,
  "builds": [
    {
      "src": "index.js",
      "use": "@vercel/static-build"
    }
  ],
  "routes": [
    {
      "src": "/(.*)",
      "dest": "index.js"
    }
  ],
  "build": {
    "env": {
      "NODE_ENV": "production"
    }
  }
}