Placeholder image for Open edX Studio logo, when not running on edx.org

This is for OPEN-306. @explorerleslie said that UX should design a proper logo for Studio that does not use the edX trademark, but for now, I've hacked together a placeholder logo.
Can you show me where in this file we import settings from `lms.envs.common`? I don't see that anywhere. `cms` and `lms` are separate.