firebase.json

{
  "hosting": {
    "public": "build",
    "rewrites": [
      {
        "source": "**",
        "function": "app_ssr"
      }
    ],
    "headers": [
      {
        "source": "/index.html*",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "no-cache"
          }
        ]
      },
      {
        "source": "/service-worker.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "no-cache"
          }
        ]
      },
      {
        "source": "/favicon.ico",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=604800"
          }
        ]
      },
      {
        "source": "/static/css/*",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=31536000"
          }
        ]
      },
      {
        "source": "/static/js/*",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=31536000"
          }
        ]
      }
    ]
  }
}