Updates onboarding doc (!71) · Merge requests · GitLab.org / release / tasks · GitLab

John Skarbek requested to merge jts/update-onboarding into master Jul 15, 2020

Adds information regarding the new group structure for ops
Re-orders when things happen such that the new user has an account prior to assigning membership
Adds details on the release.gitlab.net instance
Updates the list of slack channels