Thomas,
The HANA server name can be the IP address for the HANA system. If you don't have it already then please ask your admin and they can help you. You won't really need a tool for getting the HANA server name.
There is some information available in the Lumira 1.18 user guide on Specifying HANA variables in section 5.7.4. Please see if it helps.
Are you using Lumira Cloud for publishing?