No NONMEM version with name "default" defined in psn.conf

[ldbro0]

Hi all I'm exploring using this dockerized nm/psn environment and ran into the follow issue

When I run a simple example model:
docker-compose run psn execute model128.clt

I get the follow response:
No NONMEM version with name "default" defined in psn.conf. Format should be: name=directory,version at /usr/local/share/perl/5.22.1/PsN_4_7_0/PsN.pm line 126.

How do you go about setting up the psn.conf file?

Thanks!