

it doesn’t matter
Hehe.
Anyway, I am also completely on Zigbee. While I like the concept of Matter over Thread, I wouldn’t want to switch, because it will start with a too small network to cover a good distance and if I start replacing Zigbee devices, I effectively sabotage that network as well. So my only move would be to replace all Zigbee with Matter/Thread devices. And that seems insane. So I hope I keep getting new Zigbee devices for a while.
I think you won’t regret it. If the container startup installs stuff, you might lock yourself out when the remote server has issues, your network has issues, or if the package you install changes due to an update.
With it baked into an image, you have reproducible results. If you build a new image and it doesn’t work anymore, you can immediately switch back to the old one and figure out the issue without pressure.