Add prompt to sign up for security newsletter
Overview
When first accessing a newly installed instance of GitLab via linux or Kubernetes we should prompt users to either sign up for the newsletter, or have a check box for them to opt-out of the newsletter. This should be included in the "empty-state" tasks when first landing on the instance of GitLab, or be a pop-up right away.
One of the biggest drivers for admins to upgrade to a new version of GitLab was related to security concerns so the security newsletter is a great outlet for that.
This would in particular be important for Omnibus users who are below our target % on the latest 3 versions of GitLab.
Design
Edited by Sunjung Park