Warn the users during the installation process that Application Updates remove unrelated containers from the system

[leograba]

Background

A user reported this after testing on a NVIDIA Jetson Orin, but the use case may also apply to anyone who has Docker pre-installed on their system.

After an Application Update, docker system prune -a --force is run (at least according to https://developer.toradex.com/torizon/torizon-platform/torizon-updates/torizon-updates-technical-overview/#identifying-unsuccessful-container-updates), and this removes all container images that are not actively used, whereas a reasonable expectation would be that Application Updates only touch the Docker resources it needs.

Goal

Effectively warn users that Application Updates will remove Docker resources not referenced by the Docker Compose file of the Application Updates and explicitly ask them to acknowledge it:

This installer performs Application Updates which run the command `docker system prune -a --force`.
This leads to Docker images and containers permanent data loss without user confirmation.
By proceeding, you accept this condition and acknowledge the risk of permanent data loss.
Proceed (y/N)