vercel.json

{
  "version": 2,
  "functions": {
    "api/*.js": {
      "maxDuration": 60
    },
    "frontend/api/*.js": {
      "maxDuration": 60
    }
  },
  "rewrites": [
    {
      "source": "/((?!api/|frontend/api/).*)",
      "destination": "/frontend/$1"
    }
  ]
}