Issue Description
Grub should have two boot menu options:
MistifyOS
MistifyOS Cluster Bootstrap
TBD: Which is the default? Probably normal boot.
Acceptance Criteria (How do we know when this is done?)
Booting normal boot option boots up MistifyOS in a standalone mode.
Booting Cluster Bootstrap option causes all layer 2 services to be installed so that this machine can act as a DHCP/PXE server for subsequent nodes.