firebase.json

{
  "database": {
    "rules": "database.rules.json"
  },
  "hosting": {
    "public": "dist/firebase-cms",
    "cleanUrls": true,
    "rewrites": [
      {
        "source": "**",
        "destination": "/index.html"
      }
    ],
    "headers": [
      {
        "source": "**/*.@(jpg|jpeg|gif|png)",
        "headers": [
          {
            "key": "Cache-Control",
            "value": "max-age=7200"
          }
        ]
      },
      {
        "source": "**",
        "headers": [
          {
            "key": "Content-Security-Policy",
            "value": "default-src 'self'; connect-src 'self' ws: wss: http://localhost:4200 https://*.googleapis.com; script-src 'unsafe-inline' 'unsafe-eval' 'self' https://*.google.com https://*.firebaseio.com https://cdn.ckeditor.com https://js.stripe.com/v2/; img-src 'self' data: https://*.googleusercontent.com https://firebasestorage.googleapis.com https://cdn.ckeditor.com https://*.stripe.com; font-src 'self' https://fonts.gstatic.com; style-src 'unsafe-inline' 'self' https://fonts.googleapis.com https://cdn.ckeditor.com; frame-src 'self' https://js.stripe.com https://*.firebaseio.com https://*.firebaseapp.com;"
          }
        ]
      }
    ]
  }
}