Criar certificado ssl:

mkdir /etc/apache2/ssl

openssl req -x509 -nodes -days 1825 -newkey rsa:2048 -keyout /etc/apache2/ssl/apache.key -out /etc/apache2/ssl/apache.crt

BR
PARANA
CURITIBA
ANTONINI
SERVIDOR
rpi.antonini.psc.br 
antonini.antonini.ddns.net
antonini@antonini.psc.br

a2enmod ssl

service apache2 reload

service apache2 restart

nano opatriota.org.conf

<VirtualHost *:443>
    ServerAdmin heinz@opatriota.org
    ServerName opatriota.org
    ServerAlias www.opatriota.org
    DocumentRoot /var/www/html/opatriota/
    SSLEngine on
    SSLCertificateFile	/etc/apache2/ssl/apache.crt
    SSLCertificateKeyFile /etc/apache2/ssl/apache.key
    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Debian 9
https://gist.github.com/jniltinho/ff9bef16fbf8dc8ced3b34313d58e1ab