nginx.conf

user www-data;
worker_processes 4;
pid /run/nginx.pid;

events {
        worker_connections 768;
        # multi_accept on;
}

http {
    upstream primes {
        server 172.17.0.111:5000;
        server 172.17.0.112:5000;
        server 172.17.0.110:5000;
        server 172.17.0.109:5000;
        server 172.17.0.108:5000;
        server 172.17.0.107:5000;
        server 172.17.0.106:5000;
        server 172.17.0.105:5000;
        server 172.17.0.102:5000;
        server 172.17.0.104:5000;
        server 172.17.0.103:5000;
        server 172.17.0.101:5000;
        server 172.17.0.100:5000;
        server 172.17.0.99:5000;
        server 172.17.0.98:5000;
        server 172.17.0.97:5000;
        server 172.17.0.96:5000;
        server 172.17.0.95:5000;
        server 172.17.0.94:5000;
        server 172.17.0.93:5000;
    }

    server {
        listen 80;

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