Shell Configuration Parameters
shell: (Optional) Configuration for the embedded shell
sshdPort: The port that the shell ssh daemon should listen on.
user: The username for connecting to the shell via SSH.
password: The password for connecting to the shell via SSH.
commandsDirectory: (Optional) The path to the directory containing additional CRaSH shell commands.
sshHostKeyDirectory: (Optional) The path to the directory containing the hostkey.pem file for connecting to the shell via SSH.
localShell: (Optional) Boot straight into shell upon start-up