I just received a zip file containing the mydomain.crt and mydomain.ca-bundle files. I would like to know how to install the certificate for a WordPress website hosted in a Google Cloud Platform instance. I have the instance configured with the common Bitnami software ( Apache 2.4.25, MySQL 5.7.18, OpenSSL 1.0.2k, PHP 7.0.18, phpMyAdmin 4.7.0, SQLite 3.7.15.1, Varnish 4.1.0, WordPress 4.8). I found plugins available from WordPress such as Really Simple SSL or Cloudflare, but I would like to avoid the use of plugins. Thanks.