add flags as array #41

Job	Run time
update_flake	44s
generate_matrix	1m 36s
build_images (x86_64, linux, server, proxmox)	16m 0s
check_flake	3m 56s
build_images (x86_64, linux, server, raw-efi)	15m 59s
build_images (x86_64, linux, server, iso)	39m 32s
build_images (x86_64, linux, bri, proxmox)	4m 39s
build_images (x86_64, linux, bri, raw-efi)	4m 7s
build_images (x86_64, linux, bri, iso)	38m 0s
build_flake (cb)	1m 2s
build_flake (pyEnv)	1m 38s
build_flake (sysdo)	1m 10s
push_update	0s
	2h 8m 23s

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