What port number is IDHUB hosted on?

Registration page says
After installation of IDHub navigate to the IDHub Registration and Setup page.
Navigate to https://<idhub.fqdn>/setup.

What is idhub.fqdn OR what is the port number I need to use with my hostname to access the URL?

Port number is 443 as per - Self Hosted Requirements
idhub.fqdn is the host name of the machine used to install IDHUB.

for reverse proxy config see (we need an document link for this)

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The question is not answered.