DaemonKit environment variables (auto)load

Hey guys.
Thank you for the awesome work!

This is a very tiny PR, I don't know if it will be of your interest at all. But I use an "internal" solution for this which is the reason that I'm trying to push to the official repo. No problem if this is not a thing that you are looking for on this project.

Sorry to bother, and very thanks for the work.