Migrating MNT Reform to ArchLinux

By default MNT Reform2 laptop comes with Debian SID image. At least that's what I got with my DYI kit. The image comes on SD card, and by default the boot switch on SoM is set to boot from SD Card. SID is fairly bleeding edge, however I still feeling myself awkward working on Debian, even though the bleeding edge is one of the reasons I'm in favour of Arch Linux. Since I have NVME which is considerably faster than SDCard, I decided to combine migration to NVME drive with migration to Arch Linux. Also as there is no boot security so far, the migration will be to encrypted LUKS2 partitions (FDE).