PPPS: The last step in setting up LCS under HTTPS on Linux is to get an SSL certificate and install it on Apache. Free is good, and LetsEncrypt.org offers that, and even has it's own installer for you to use. Your hosting provider might have a built in SSL install capability, but doing it this way not only gets you the free SSL certificate but also auto-renews it for you. Go to https://certbot.eff.org/ and 1) pick Apache for the Software selection and 2) pick your version of Linux. The examples I posted are for Ubuntu, so go with the version of Ubuntu you installed (there no reason not to go with Ubuntu 18).

enjoy,

Hank