firebase.json

{
  "database": {
    "rules": "database.rules.json"
  },
  "hosting": {
    "public": "public",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**",
      "**/src/**",
      "**/out/data/.git"
    ],
    "headers": [
      {
        "source": "**",
        "headers": [{
          "key": "Cache-Control",
          "value": "max-age=180"
        }]
      },
      {
        "source": "**/*.@(jpg|jpeg|gif|png|ico)",
        "headers": [{
          "key": "Cache-Control",
          "value": "max-age=7200"
        }]
      },
      {
        "source": "**/*.@(html|js|css)",
        "headers": [{
          "key": "Cache-Control",
          "value": "max-age=180"
        }]
      },
      {
        "source": "**/*.@(min.css|min.js|woff|woff2|json)",
        "headers": [{
          "key": "Cache-Control",
          "value": "max-age=7200"
        }]
      }
    ],
    "redirects": []
  }
}