Heh - in college I took a network security class that required us to set up our own attack/defend environments, and one of the important parts of the report was to explain to the TAs how to set up our environment. We were able to save ourselves a ton of writing by just exporting docker images like this and giving instructions on how to load those onto the VMs :)

Someone else I knew made .deb packages, which might have been smarter, since there were some hosts we didn't containerize (mainly ones that handled routing and such; I know now we might have been able to get away with doing it, but at the time I didn't and I thought it might be too much hassle for an already complicated project)