yaml -> json
./ct-v0.9.3-x86_64-unknown-linux-gnu --in-file server_new.yaml > server_new.json


connect hard drive to running system and then install
sudo ./flatcar-install -d /dev/sdb -C stable -i server_new.json


- this failed, during gpg verification, then re-downloaded new version from github -> worked 


couldn't use flatcar on new machine because it didn't boot with:
	moklistrt: not found
	I played around in bios settings, disabled secure boot etc.. didn't help
	went for debian instead