No local doc about execution-environment.yml

No local guide to writing execution-environment.yml.

Possible I didn’t see what was right in front of my face here, just checking -

Is there a local guide to writing ansible-builder’s config file execution-environment.yml?

(As in a file on my machine provided by the package, not on a remote website)

I can’t find anything about the content of ansible-builder’s config file on my Fedora install. No man page, no commented example in /etc/ or /usr/share/doc/, no copy of Execution environment definition — Ansible Builder Documentation, and no pointers given by ansible-builder -h.