vhost nginx proxy

vhost.conf

upstream confluence {
    server sertver_backend:8090;
    keepalive 300;
}

server {
    listen haproxy.fabio.com.br:80;
    server_name confluence.fabio.com.br;
    access_log  off;
    error_log /dev/null crit;
    if ($host != "confluence.fabio.com.br") {
        return 404;
    }
    location / {
        proxy_pass http://confluence;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP      $remote_addr;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    }
}