Build a minimal Linux image for the Control UI runtime

[valeriansaliou]

Requirements:

• Should show a MakAir boot logo when the system boots up;
• Should be built using a script that runs eg. in Docker and re-compiles the system from scratch;
• Should generate an image containing the minimal Linux + the Control UI binary as pulled from the target GitHub tag and re-compiled;
• Should disable all non-needed RPi features & ports;
• Should underclock the RPi by changing the CPU governor to powersave, which would limit clock speed to ~600 MHz - ~1 GHz maximum and prevent wear, heat and high power consumption. This requires improvements on the peak CPU usage of the UI first. In any cases, the CPU should never use the 1.5GHz clock, which is the one producing the most heat;

[valeriansaliou]

See: https://linuxconfig.org/how-to-run-x-applications-without-a-desktop-or-a-wm

[valeriansaliou]

See: https://intestinate.com/pilfs/guide.html