Most likely, you're running a Tomcat bundle. Tomcat is an
application- or web-server. You can basically follow any instruction
set that you find for Tomcat, but use the Liferay bundle instead.
Or, if you run a docker container, follow dockerized installation
instructions. Though: Make sure you mount persistent volumes where you
need them.
https://learn.liferay.com/ has all the Liferay-specific information,
but as "how to host a server on the internet" is not
specific, this part isn't covered there.
If the commercial version is a good option, contacting Liferay Sales
for the PaaS offering (ready-to-go cloud hosted) is a good
alternative. Though its price tag is certainly far above a
hobby-hosting situation. If you're hosting this installation for an
enterprise: This gets you up quickly.
