sample-vhost

upstream containers {
    server 0.0.0.0:9000;
    server 0.0.0.0:9001;
    server 0.0.0.0:9002;
    server 0.0.0.0:9003;
}

server {
    listen 80;
    server_name hostname;


    location / {
        proxy_pass http://containers;
    }
}