Installing Arch Linux ARM on a SD card for Raspberry Pi 0 W and loading wifi credentials for headless usage
Before starting I highly suggest you create a new directory on your /home/user
directory with an appropiate name for this task like rpi0alarm
so you can change directory to /home/user/rpi0alarm
and go through the following steps.
As I wrote this guide after collecting info from different sources (listed at the end) be mindful of your current path and the commands you are running to not damage your current installation on the host computer you are creating the SD Card.