Help for installing LDAP Phone Book for FreePBX

I recently came across the LDAP-Server for Freepbx ( I would like to use it, but I am not sure how to install it. I am not a Linux expert. Can someone explain the needed steps? I was already able to get “go” installed on my freepbx server. I could successful run the command go build. Now I stuck in the recommended install procedure.
It says: cp /opt/freepbx-ldap/freepbx-ldap
What do I need to do do get the ssh-bastion binary? How is the installing procedure for this? Any advice would be appreciated!
Kind regards