我已经开发了这个应用程序与 flask 作为后端和Reactjs作为前端.我的文件夹结构：

mydomain/
    /server
        __init__.py
        ...
    /client (react)
        /dist
            index.html
            /assets (contains js and css)
    /venv

我的nginx配置：

server {
        server_name <mydomain> www.<mydomain>;
        root /home/sabbir/<mydomain>/client/dist/;
        index index.html;

        location / {
                try_files $uri $uri/ =404;
        }
    location /api {
            include proxy_params;
            proxy_pass http://localhost:5000;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/<mydomain>/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/<mydomain>/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot



}
server {
    if ($host = www.<mydomain>) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

当我尝试注册一个用户时，它给出这个错误：同源策略不允许读取位于http：//localhost：5000/auth/login的远程资源。（原因：CORS请求未成功）。状态代码：（无）
任何帮助都将不胜感激。