Docker builds unmaintained and essentially broken

[JedMeister]

Marcos has highlighted that our Docker builds are broken and the website documentation does not result in a working TurnKey system. He has also provided some potential fixes which are greatly appreciated.

Our Docker builds really do need some love and be bought up to scratch. Unfortunately I'm not sure when we'll have some spare cycles, I have pinned this to the v19.x milestone, but obviously sooner would be better than later! So we'll see what we can do...

[OnGle]

It may not be ideal, but now we have the dockerize script, we may be able to build a new set of working docker builds relatively easily.

[JedMeister]

TBH I don't recall what the actual issue was. And there is a bt-docker buildtasks script - which handles the upload of containers to the Docker Hub. We should consider merging bt-docker and dockerize, then call the merged script from buildtasks.

Regardless, we should definitely look to release docker builds for v19.0.