#ports.conf file

Listen 80
Listen 3000

<IfModule ssl_module>
        Listen 443
</IfModule>

<IfModule mod_gnutls.c>
        Listen 443
</IfModule>


#000-default-le-ssl.conf file this works fine
<Proxy balancer://webapp>
        BalancerMember http://server 1 IP:80
        BalancerMember http://Server 2 IP:80
        </Proxy>

        ProxyPreserveHost On

        ProxyPass / balancer://webapp/
        ProxyPassReverse / balancer://webapp/

ServerName myservername
SSLCertificateFile /etc/letsencrypt/live/mydomain/fullchain.pem
SSLCertificateKeyFile /etc/letsencrypt/live/mydomain/privkey.pem
Include /etc/letsencrypt/options-ssl-apache.conf