How can I get Cloudflare Tunnel to work?

I’m brand new to platform and as a test I am trying to migrate some of our legacy PHP (no framework) sites. All our our sites use Cloudflare Tunnels:
(Cloudflare Tunnel · Cloudflare Zero Trust docs)

I need to know how to install the cloudflare tunnel app and make it run in the background. Then I need to figure out how to configure our websites to connect to localhost. I don’t need any routing or WAF, since that is all handled by Cloudflare.

Cloudflare Tunnel is an open source project written in Go, so it seems like I should be able to get it to run on platform.

Since this is my first experience with, I’m not sure where to start.