firebase.json

{
  "firestore": {
    "rules": "firebase/firestore.rules",
    "indexes": "firebase/firestore.indexes.json"
  },
  "hosting": {
    "appAssociation": "AUTO",
    "cleanUrls": true,
    "ignore": ["firebase.json", "**/.*", ".DS_Store", "**/node_modules/**"],
    "headers": [
      {
        "source": "/flutter_service_worker.js",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "no-cache"
          }
        ]
      },
      {
        "source": "**/*.@(jpg|jpeg|gif|png|svg|webp|js|css|map|eot|otf|ttf|ttc|woff|woff2|font.css)",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "public, max-age=31536000, immutable"
          },
          {
            "key": "X-Robots-Tag",
            "value": "noarchive"
          }
        ]
      },
      {
        "source": "**",
        "headers": [
          {
            "key": "Referrer-Policy",
            "value": "strict-origin-when-cross-origin"
          },
          {
            "key": "Strict-Transport-Security",
            "value": "max-age=31536000; includeSubDomains; preload"
          },
          {
            "key": "X-Content-Type-Options",
            "value": "nosniff"
          },
          {
            "key": "X-Frame-Options",
            "value": "SAMEORIGIN"
          },
          {
            "key": "X-Robots-Tag",
            "value": "nofollow, noimageindex, noarchive"
          },
          {
            "key": "X-XSS-Protection",
            "value": "1; mode=block"
          }
        ]
      }
    ],
    "rewrites": [
      {
        "source": "/robots.txt",
        "destination": "/robots.txt"
      },
      {
        "source": "/sitemap{,/**}",
        "destination": "/sitemap.xml"
      },
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "public": "build/web",
    "trailingSlash": false
  },
  "emulators": {
    "auth": {
      "port": 9093
    },
    "firestore": {
      "port": 9092
    },
    "hosting": {
      "port": 9091
    },
    "ui": {
      "enabled": true,
      "port": 9090
    }
  }
}