Secure Boot support is enabled. Make it clear in the doc that it was
enabled so Windows could be installed, and not as a means for securing
the system.
Signed-off-by: Tim Crawford <tcrawford@system76.com>
Document that only UEFI booting is supported, the current status of
Secure Boot, and that the shell and networking are disabled.
Signed-off-by: Tim Crawford <tcrawford@system76.com>
