Downgrade ruby version to 2.4.4 because of a PollMailbox job bug (!9) · Merge requests · webservices / discourse-cern · GitLab

Ismael Posada Trobo requested to merge ruby_2_x into master Apr 19, 2018

Downgrade ruby version to 2.4.4 because of a PollMailbox job bug (see https://bugs.ruby-lang.org/issues/14416)
Seems to be fixed on 2.6.0_preview, but since it is not a stable version, we proceed with the previous one.
Removed npm package from Dockerfile (it is included with the nodejs package).