Carrying over from setup of primary directory setup same way and use command line parameters to quickly duplicate but add -h to specify the different hostname,
setup --cli --baseDN cd=krypton,dc=com --sampleData 20 --ldapPort 1389 --adminConnectorPort 4444 --rootUserDN cn=Directory Manager --rootUserPassword T1ns3cur3:) --doNotStart --no-prompt --noPropertiesFile