firebase.json

{
  "hosting": [
    {
      "target": "dartpad",
      "public": "build/web",
      "ignore": [
        "firebase.json",
        "**/.*",
        "**/node_modules/**"
      ],
      "redirects": [
        {
          "source": "/embed-dart?(.html)",
          "destination": "/?embed=true",
          "type": 301
        },
        {
          "source": "/embed-flutter?(.html)",
          "destination": "/?embed=true",
          "type": 301
        },
        {
          "source": "/embed-flutter_showcase?(.html)",
          "destination": "/?embed=true",
          "type": 301
        },
        {
          "source": "/embed-html?(.html)",
          "destination": "/?embed=true",
          "type": 301
        },
        {
          "source": "/embed-inline?(.html)",
          "destination": "/?embed=true",
          "type": 301
        },
        {
          "source": "/workshops?(.html)",
          "destination": "https://github.com/dart-lang/dart-pad/wiki/Workshop-authoring-guide",
          "type": 301
        }
      ],
      "rewrites": [
        {
          "source": "**",
          "destination": "/index.html"
        }
      ],
      "headers": [
        {
          "source": "/frame/assets/**",
          "headers": [
            {
              "key": "Access-Control-Allow-Origin",
              "value": "*"
            }
          ]
        },
        {
          "source": "**",
          "headers": [
            {
              "key": "Cross-Origin-Opener-Policy",
              "value": "same-origin"
            },
            {
              "key": "Cross-Origin-Embedder-Policy",
              "value": "credentialless"
            },
            {
              "key": "Cross-Origin-Resource-Policy",
              "value": "cross-origin"
            },
            {
              "key": "X-Content-Type-Options",
              "value": "nosniff"
            },
            {
              "key": "Referrer-Policy",
              "value": "strict-origin-when-cross-origin"
            }
          ]
        }
      ]
    },
    {
      "target": "preview",
      "public": "build/web",
      "ignore": [
        "firebase.json",
        "**/.*",
        "**/node_modules/**"
      ]
    }
  ]
}