gaemangtalk_frontend:它是面向有抱负的开发人员的Tok，Gaemang Tok前端存储库。

凭什么？ 什么是凭证？ 如果为true，则可以在不同端口之间共享cookie 我将其更改为true，因为发生了cors错误。 Access to XMLHttpRequest at 'http://54.180.141.91:8080/api/user/signup/emailCheck' from origin 'http://localhost:3000' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's