server {
    listen       80;
    listen  [::]:80;
    server_name  localhost;
    location / {
        root   /usr/share/nginx/html;
        index  index.html index.htm;
    }

    error_page   500 502 503 504  /50x.html;
    location = /50x.html {
        root   /usr/share/nginx/html;
    }

    # 支付接口
    location /pay/ {
        proxy_set_header Host $host:$server_port; #远程主机 IP:PORT
        proxy_set_header X-Real-PORT $remote_port; #远程端口
        proxy_set_header X-Real-IP $remote_addr; #远程地址
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; #远程代理地址
        proxy_pass  http://pay:8888/pay/;
    }   

}