vercel.json

{
  "headers": [
    {
      "source": "/api/(.*)",
      "headers": [
        { 
          "key": "Access-Control-Allow-Credentials", 
          "value": "true" 
        },
        { 
          "key": "Access-Control-Allow-Origin", 
          "value": "https://doapp-ten.vercel.app" 
        },
        { 
          "key": "Access-Control-Allow-Methods", 
          "value": "GET,OPTIONS,PATCH,DELETE,POST,PUT" 
        },
        { 
          "key": "Access-Control-Allow-Headers", 
          "value": "X-CSRF-Token, X-Requested-With, Accept, Accept-Version, Content-Length, Content-MD5, Content-Type, Date, X-Api-Version, Authorization, Notion-Version" 
        }
      ]
    }
  ],
  "rewrites": [
    {
      "source": "/api/notion/:path*",
      "destination": "/api/notion"
    },
    {
      "source": "/(.*)",
      "destination": "/index.html"
    }
  ]
}