I made the mistake in that post of not mentioning that I didn't want to be required to connect the rm2 to wifi, and installing a package manager would mean I would need to do that to install software. If anything it would be something I would temporarily install, use it to install rsync, then figure out how to uninstall it, and in my mind that's functionally equivalent to what I was doing with docker. Pushing to / instead of /opt was my mistake :)

I apologize, I could have better expressed why I took the path I did. I'll edit the post later today.