json-server-vercel/vercel.json

{
  "builds": [
    {
      "src": "index.js",
      "use": "@vercel/node"
    },
    {
      "src": "main.py",
      "use": "@vercel/python"
    }
  ],
  "functions": {
    "api/server.js": {
      "memory": 1024,
      "includeFiles": "db.json"
    }
  },
  "rewrites": [
    {
      "source": "/(.*)",
      "destination": "api/server.js"
    }
  ]
}