Request: Node LTS version

[svenstucki]

Just as a possible input, it would be great to have a version with Node.js LTS (nodejs-lts-carbon instead of nodejs).

Sometimes packages are not yet compatible with the newest version of node. E.g. realm does not support version 10 yet. Hence any project using it can not be built with this image.

We did this in a fork and it works well with the other packages (like npm and yarn).