user@user-pc:/etc/apache2/sites-available# cat ssl.conf 
<IfModule mod_ssl.c>
	<VirtualHost *:443>
		ServerAdmin webmaster@ccu.csie.one
		DocumentRoot /var/www/html

		ErrorLog ${APACHE_LOG_DIR}/error.log
		CustomLog ${APACHE_LOG_DIR}/access.log combined

		SSLEngine on
		SSLCertificateFile	/etc/ssl/crt/server.pem
		SSLCertificateKeyFile /etc/ssl/crt/server.key
	</VirtualHost>
</IfModule>