Provide package for Debian 9 (stretch)

Installing the package repo for stretch is possible (manually):

deb https://packages.gitlab.com/gitlab/gitlab-ce/debian/ stretch main
deb-src https://packages.gitlab.com/gitlab/gitlab-ce/debian/ stretch main

The repo updates just fine, but there is no gitlab-ce package yet.

# apt update
Hit:1 http://security.debian.org/debian-security stretch/updates InRelease
Hit:2 http://cdn-fastly.deb.debian.org/debian stretch InRelease  
Hit:3 https://packages.gitlab.com/gitlab/gitlab-ce/debian stretch InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.
root@git:/tmp# apt install gitlab-ce
Reading package lists... Done
Building dependency tree       
Reading state information... Done
E: Unable to locate package gitlab-ce

Please provide a package, stretch is nearing it's stable release and they only ship 8.13 from their repositories.