Merge branch 'gitlab.com-packages' into 'master'

Gitlab.com uses special packages, build them first

See merge request !1255

doc/release/monthly.md

@@ -285,7 +285,8 @@ Proposed tweet for CE "GitLab X.X is released! It brings *** <link-to-blogpost>"
 # **1 workday after release - Update GitLab.com**
-Update GitLab.com from RC1 to the released package.
+- Build a package for gitlab.com based on the official release instead of RC1
+- Deploy the package
 # **25th - Release GitLab CI**