firebase.json

{
  "hosting": {
    "public": "dist",
    "ignore": ["firebase.json", "**/.*", "**/node_modules/**"],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "**",
        "headers": [
          {
            "key": "Content-Security-Policy",
            "value": "default-src 'self'; connect-src 'self' https://firebase.googleapis.com https://firebaseinstallations.googleapis.com https://firestore.googleapis.com https://www.googleapis.com https://securetoken.googleapis.com https://identitytoolkit.googleapis.com; script-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data:; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; object-src 'none'"
          },
          {
            "key": "Permissions-Policy",
            "value": "geolocation=()"
          },
          {
            "key": "Referrer-Policy",
            "value": "strict-origin-when-cross-origin"
          },
          {
            "key": "X-Content-Type-Options",
            "value": "nosniff"
          },
          {
            "key": "X-Frame-Options",
            "value": "SAMEORIGIN"
          }
        ]
      }
    ]
  },
  "functions": {
    "predeploy": "npm --prefix \"$RESOURCE_DIR\" run build",
    "source": "functions"
  },
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "emulators": {
    "auth": {
      "port": 9099
    },
    "functions": {
      "port": 5001
    },
    "firestore": {
      "port": 8080
    },
    "hosting": {
      "port": 5000
    },
    "ui": {
      "enabled": true
    },
    "pubsub": {
      "port": 8085
    }
  }
}