B4J Question [B4J] Run two(Or More) server in a VPS

### $ cat /etc/nginx/nginx.conf

worker_processes  1;

events {
    worker_connections  1024;
}

http {
    # include       mime.types;
    # default_type  application/octet-stream;
    # sendfile        on;
    # keepalive_timeout  65;

    server {
        listen      80;
        server_name a.com;
        location / {
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   Host      $http_host;
           
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
           
            proxy_pass         http://127.0.0.1:8081;
        }
     
    }

    server {
        listen       80;
        server_name b.com;
        location / {
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   Host      $http_host;
           
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
           
            proxy_pass         http://127.0.0.1:8082;
        }
       
    }
}

server {
        listen      80;
        server_name vps.jinyistudio.tw;
        location / {
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   Host      $http_host;
       
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
       
            proxy_pass         http://127.0.0.1:8001;
        }
 
    }