How to set up CORS?

Question

Nginx

I use the Nginx + PHP-FPM bundle for requests to set such headers

add_header 'Access-Control-Allow-Origin' 'http://localhost:8080';
        add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS, PUT';
        add_header 'Access-Control-Allow-Headers' '*';
        add_header 'Access-Control-Expose-Headers' '*';

When I send a request from my vue application via axios I get an error

Access to XMLHttpRequest at ' localhost/api/institutes/6fe90daaeeaa3f272d8196bb7... ' from origin ' localhost:8080 ' has been blocked by CORS policy: The value of the 'Access-Control-Allow-Origin' header in the response must not be the wildcard '*' when the request's credentials mode is 'include'. The credentials mode of requests initiated by the XMLHttpRequest is controlled by the withCredentials attribute.

But in response the answer I expected comes
How to fix this error?

Answer 1

Doesn't it bother you that there is nothing about port 8080 in the request url? Well, in general, why is he in principle?