upstream  zed {
        server 192.168.0.1:3000 max_fails=3 fail_timeout=30s;
        server 192.168.0.2:3000 backup max_fails=3 fail_timeout=30s;
}

server {
    listen       80;
    server_name  zed.com;
    location / {
            proxy_pass http://zed/;
    }
}