Depending on your stance on how configs should be set up for desktop stuff... /etc should be a base part of the image. Any customizations you need in there should be injected at build time. That would be your customized etc configs would be sitting in the directory with your docker file, which would then be searchable.
That's the kind of standardization I had in mind :) Building such a system, we must make sure to have all the etc files in repos, even if we do not edit them, and copy them on build, instead of just having them in repos if we want to make a change, or using `sed` in dockerfile to edit them.
That is, for people who want their etc files easily lookable, of course.
