解決跨域問題：has been blocked by CORS

在編輯器web容器能夠顯示在瀏覽器沒法顯示。 解決跨域問題：報錯has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.或者沒法加載文件報錯from origin ‘null’ has been blocked by CORS poli

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