Apache conf for reverse proxy with HTTPS let's encrypt

subdomain.domain.conf

<IfModule mod_ssl.c>
<VirtualHost *:443>
        ServerName subdomain.domain.ovh
        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html
        # Include external config for specific locationInclude
        Include /home/userapp/apache.conf/web.conf
        # Available loglevels: trace8, ..., trace1, debug, info, notice, warn,
        # error, crit, alert, emerg.
        # It is also possible to configure the loglevel for particular
        # modules, e.g.
        #LogLevel info ssl:warn
        ErrorLog ${APACHE_LOG_DIR}/ssl.error.log
        CustomLog ${APACHE_LOG_DIR}/ssl.access.log combined

        # Sample for Keycloak
        ProxyPass /auth http://127.0.0.1:8080/auth
        ProxyPassReverse /auth http://127.0.0.1:8080/auth

        #Can ignore SSL Check on destination proxy example auto signed certificate on springboot
        SSLProxyCheckPeerCN off
        SSLProxyCheckPeerExpire off
        SSLProxyCheckPeerName off
        SSLProxyEngine On
        SSLProxyVerify none

        ProxyPreserveHost On
        ProxyPass /secure https://127.0.0.1:8443/special_secure
        ProxyPassReverse /secure https://127.0.0.1:8443/special_secure

        RequestHeader set X-Forwarded-Proto https
        # Let's encrypt
        SSLCertificateFile /etc/letsencrypt/live/subdomain.domain.ovh/fullchain.pem
        SSLCertificateKeyFile /etc/letsencrypt/live/subdomain.domain.ovh/privkey.pem
        Include /etc/letsencrypt/options-ssl-apache.conf


</VirtualHost>

# vim: syntax=apache ts=4 sw=4 sts=4 sr noet
</IfModule>