Docs: Restrict Payara HTTP listener to localhost for security

[ofahimIQSS]

Description:
This PR improves the “Securing Your Installation” section by adding explicit instructions for binding Payara’s HTTP listener (http-listener-1, port 8080 by default) to 127.0.0.1 when Apache or Nginx is running on the same host.
This ensures port 8080 is only accessible locally and not exposed to the public internet.

Changes include:

1. Added new subsection “Restricting Payara’s HTTP Listener to Localhost” under Additional Recommendations in Securing Your Installation.
2. Corrected outdated reference to “AJP listener” in the Network Ports section to “HTTP listener” and updated the command to the correct modern form:

asadmin set configs.config.server-config.network-config.network-listeners.network-listener.http-listener-1.address=127.0.0.1
asadmin restart-domain

Added note about optionally removing port 8080 from firewall or cloud security group rules for extra protection.

Why:
8080 was recently found to be exposed on a production server. Binding it to localhost prevents unintended public access while still allowing Apache/Nginx to proxy to Payara internally.

Testing:
Verified commands work on Payara 6.x.
Confirmed ss -lntp output changes from *:8080 to 127.0.0.1:8080.
Confirmed public access to 8080 is refused while local access works.

https://dataverse-guide--11743.org.readthedocs.build/en/11743/installation/config.html#restricting-payara-s-http-listener-to-localhost

[pdurbin]

@ofahimIQSS this PR has the quickstart guide in it. It might be easiest for you to make a fresh PR off develop.

[ofahimIQSS]

Closing - will open new PR