[root@centos ~]# vi /etc/httpd/conf.d/virtual-le-ssl.conf
↓下記を追加
<VirtualHost *:443>
ServerName example.com:443
ServerAlias www.example.com
DocumentRoot /home/example/public_html
ErrorLog /var/log/httpd/example.com-error_log
CustomLog /var/log/httpd/example.com-access_log combined env=!nolog
SSLCertificateFile /etc/letsencrypt/live/example.com/cert.pem
SSLCertificateKeyFile /etc/letsencrypt/live/example.com/privkey.pem
SSLCertificateChainFile /etc/letsencrypt/live/example.com/chain.pem
<Directory "/home/example/public_html">
Options Includes ExecCGI FollowSymLinks
</Directory>
</VirtualHost>
[root@centos ~]# systemctl restart httpd