Update Dockerfile to support j7 Robot

[laughing-penguins]

The j7 / j7+ requires a different cipher to work. Also the version of node (boron/6.x) doesn't have support for the newer cipher.

[jeremywillans]

These changes break existing robots - may need to be added as an additional line when using a j7

[laughing-penguins]

@jeremywillans should at least an update the version node?

[fatt0ny]

Cant tell you how many hours I spent trying to get this to work - until I stumbled upon this!
Many thanks to @laughing-penguins
& go's without saying, to the original creator of this project!
Kind regards

[Kirbo]

Any others able to retrieve the location or J7 / J7+ with this docker image? I was able to finally get any kind of response in http://192.168.1.10:3000/api/local/info/state, but location property is missing. Perhaps the maintenance stuff as well? I have no idea where/how should these be even read.