serve.json

{
  "headers": [
    {
      "source": "**/*",
      "headers": [
        {
          "key": "Cross-Origin-Opener-Policy",
          "value": "same-origin"
        },
        {
          "key": "Cross-Origin-Embedder-Policy",
          "value": "require-corp"
        },
        {
          "key": "X-Frame-Options",
          "value": "SAMEORIGIN"
        },
        {
          "key": "X-Content-Type-Options",
          "value": "nosniff"
        }
      ]
    }
  ],
  "rewrites": [
    {
      "source": "/{lang}/**",
      "destination": "/{lang}/index.html"
    },
    {
      "source": "**",
      "destination": "/index.html"
    }
  ],
  "cleanUrls": true,
  "trailingSlash": false
}