Only the subdomain prefix, which should be the name of the service.
Example: Subdomain product would give the end result of an API-GW with
product.platform.example.no.
OptionalttlThe Time To Live (TTL) for the public DNS A record that will expose the API-GW. This is how long DNS servers will cache the record.
A long TTL (hours) is beneficial to DNS servers, but makes developers (you) wait longer when doing changes.
Hosted Zone for the external facing domain. This is where routes will be created, to redirect consumers to the API-GW. For example a HZ for
platform.example.no.