firebase.json

{
  "hosting": {
    "public": "build",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "/sw.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=700000"
          }
        ]
      },
      {
        "source": "**/*.@(eot|otf|ttf|ttc|woff)",
        "headers": [
          {
            "key": "Access-Control-Allow-Origin",
            "value": "max-age=2628000"
          }
        ]
      },
      {
        "source": "**/*.@(css|jpg|jpeg|png|gif|js|ico)",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=2628000"
          }
        ]
      },
      {
        "source": "**/*.chunk.*.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=2628000"
          }
        ]
      }
    ],
    "cleanUrls": true,
    "trailingSlash": false
  }
}