upstream web {  
  ip_hash;
  server web:8000;
}

# portal
server {  
  location / {
		add_header 'Cache-Control' 'no-store, no-cache, must-revalidate, proxy-revalidate, max-age=0';
  		expires off;
		sendfile off;
		proxy_cache off;
        proxy_pass http://web/;
    }
  listen 8000;
  server_name 192.168.99.100;
}