Update Node to v6 (or 8 ???) on aarch64

[vielmetti]

On aarch64, the version provided still pulls in Node 4, instead of Node 6 like all the rest.

It should be a simple one-line fix to the FROM line in the Dockerfile, but there's a small snag in Node version naming at Docker hub. I don't want to pull in some specific point release of Node, just whatever is latest for 6.

See tianon/jenkins-groovy#21 for the naming issue on Docker hub, and when it gets resolved this will be very easy to resolve as well.

[dceejay]

Should this now also be node 8 ? and move to the newer official repo ? https://hub.docker.com/r/arm64v8/node/

https://github.com/docker-library/official-images#architectures-other-than-amd64

[vielmetti]

It'd be really nice to package this as a multiarch repo, perhaps even in the official repos. I'll ping @tianon to see what he thinks.

[dceejay]

Node-RED 1.0.0 is now available on docker hub - https://hub.docker.com/r/nodered/node-red.

This closes this issue.

There are a few changes to the new release, please read the README for further details.