https://s-matyukevich.github.io/raspberry-pi-os/docs/lesson01/rpi-os.html
cable: outside (rim), skip first two, then: BLACK, WHITE, GREEN
boot options
https://www.raspberrypi.org/documentation/configuration/config-txt/boot.md
os dev
https://wiki.osdev.org/Raspberry_Pi_Bare_Bones#Pi_3.2C_4
# raspberry pi
sudo snap install rpi-imager
sudo rpi-imager
# ubuntu pie
sudo apt get install -y gcc vim git
screen
sudo screen /dev/ttyUSB0 115200
# docker shit
https://www.digitalocean.com/community/tutorials/how-to-install-and-use-docker-on-ubuntu-20-04
# NOPE
# xz --decompress ubuntu-20.10-preinstalled-desktop-arm64+raspi.img.
