About the signing part, we definitely have to improve that. Thank you for mentioning.
About the channel, the (real) install script is based on Fabric and use SSH. So you can refer directly to this: http://cozy.io/host/install.html
About the channel, the (real) install script is based on Fabric and use SSH. So you can refer directly to this: http://cozy.io/host/install.html
Not that what you are suggesting is good in the first place.