vercel.json

{
  "headers": [
    {
      "source": "/api/counter",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "public, max-age=86400"
        },
        {
          "key": "Access-Control-Allow-Origin",
          "value": "*"
        }
      ]
    },
    {
      "source": "/api/(.*)",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "no-store, max-age=0"
        },
        {
          "key": "Access-Control-Allow-Origin",
          "value": "*"
        }
      ]
    },
    {
      "source": "/service-worker.js",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "no-store, max-age=0"
        }
      ]
    },
    {
      "source": "/_next/static/(.*)",
      "headers": [
        {
          "key": "Cache-Control",
          "value": "public, max-age=31536000, immutable"
        }
      ]
    }
  ]
}