vercel.json

{
  "builds": [
    {
      "src": "vercel-build.sh",
      "use": "@vercel/static-build",
      "config": {
        "distDir": "public"
      }
    }
  ],
  "routes": [
    {
      "handle": "filesystem"
    },
    {
      "src": "/(.*)",
      "status": 404,
      "dest": "/404.html"
    }
  ]
}