The bootserver host tool can be used to pave, netboot or boot Fuchsia on a target device. This tool is very likely to go away in the short future with a replacement being currently implemented.
To pave and boot on an x64 target, run:
bootserver --efi "<IMAGE_PATH>/local.esp.blk" --fvm "<IMAGE_PATH>/fvm.sparse.blk" --kernc "<IMAGE_PATH>/zircon.vboot" --zircona "<IMAGE_PATH>/fuchsia.zbi" "<IMAGE_PATH>/fuchsia.zbi" -1
To pave and boot on an arm64 target, run:
bootserver --fvm "<IMAGE_PATH>/obj/build/images/fvm.sparse.blk" --zircona "<IMAGE_PATH>/fuchsia.zbi" --zirconb "<IMAGE_PATH>/fuchsia.zbi" -1