I'm not a Ruby user so I can't give you the great answer that you are probably hoping for sorry... Under the hood, TurnKey is Debian (v14.x = Debian Jessie) though so hopefully if you google you may be able to find an expert who uses Debian that can share a great recipe. Ubuntu is also based on Debian (although generally not binary compatible as TurnKey is). So instructions for a similar version of Ubuntu (Ubuntu 14.04 is very close to Debian Jessie) may also work, but YMMV.
Regardless, for future reference I suggest that you create a post in the forums itself. Comments on the documentation often get missed. I actually only accidentally came across this post...
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Hi David
Regardless, for future reference I suggest that you create a post in the forums itself. Comments on the documentation often get missed. I actually only accidentally came across this post...