firebase.json

{
  "firestore": {
    "rules": "firestore.rules",
    "indexes": "firestore.indexes.json"
  },
  "hosting": {
    "public": "dist",
    "ignore": [
      "firebase.json",
      "**/.*",
      "**/node_modules/**"
    ],
    "headers": [
      {
        "source": "**",
        "headers": [
          {
            "key": "Content-Security-Policy",
            "value": "default-src 'self'; script-src 'self' 'unsafe-inline' https://apis.google.com https://accounts.google.com https://*.firebaseapp.com https://www.googletagmanager.com; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; connect-src 'self' https://firestore.googleapis.com https://apis.google.com https://accounts.google.com https://*.firebaseio.com https://*.firebaseapp.com https://identitytoolkit.googleapis.com https://securetoken.googleapis.com https://firebase.googleapis.com firebaseinstallations.googleapis.com https://www.google-analytics.com; frame-src 'self' https://accounts.google.com https://apis.google.com https://*.firebaseapp.com; img-src 'self' https://firebasestorage.googleapis.com data:; font-src 'self' https://fonts.gstatic.com;"
          },
          {
            "key": "Cross-Origin-Opener-Policy",
            "value": "unsafe-none"
          },
          {
            "key": "Cross-Origin-Embedder-Policy",
            "value": "unsafe-none"
          },
          {
            "key": "Cross-Origin-Resource-Policy",
            "value": "cross-origin"
          }
        ]
      }
    ],
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ]
  }
}