firebase.json

{
  "hosting": {
    "public": "../../deploy/docs",
    "redirects": [
      {
        "source": "/error/:namespace\\::error*",
        "destination": "/error/:namespace/:error*",
        "type": 302
      }
    ],
    "rewrites": [
      {
        "source": "**/*!(.@(jpg|jpeg|gif|png|html|js|map|json|css|svg|ttf|txt|woff|woff2|eot|xml))",
        "function": "sendFile"
      }
    ],
    "headers": [
      {
        "source": "/examples/**.csp/*.html",
        "headers": [{
          "key": "Content-Security-Policy",
          "value": "default-src 'self'"
        }]
      },
      {
        "source": "/Error404.html",
        "headers" : [{
          "key" : "X-Robots-Tag",
          "value" : "noindex"
        }]
      },
      {
        "source": "/@(partials|examples)/**",
        "headers" : [{
          "key" : "X-Robots-Tag",
          "value" : "noindex"
        }]
      }
    ]
  }
}