A boot source descriptor
https://github.com/firecracker-microvm/firecracker/blob/f0691f8253d4bde225b9f70ecabf39b7ad796935/src/firecracker/swagger/firecracker.yaml#L1029
Optional
Kernel boot arguments
Host level path to the kernel image used to boot the guest
Host level path to the initrd image used to boot the guest
A boot source descriptor
See
https://github.com/firecracker-microvm/firecracker/blob/f0691f8253d4bde225b9f70ecabf39b7ad796935/src/firecracker/swagger/firecracker.yaml#L1029