godot/platform/web/serve.json

{
    "public": "../../bin",
    "headers": [{
        "source": "**/*",
        "headers": [
            {
                "key": "Cross-Origin-Embedder-Policy",
                "value": "require-corp"
            }, {
                "key": "Cross-Origin-Opener-Policy",
                "value": "same-origin"
            }, {
                "key":  "Access-Control-Allow-Origin",
                "value": "*"
            }, {
                "key": "Cache-Control",
                "value": "no-store, max-age=0"
            }
        ]
    }]
}