Your repository is empty! Put some packages in it like this:
Install the package_cloud gem: gem install package_cloud. If you don't already have ruby and rubygems installed, click here for instructions.
Run package_cloud push --url https://packages.gitlab.com/ --config ~/packages.gitlab.com.conf runner/unstable /path/to/your/package (You may have to enter your email address and password if you haven't used the gem before.)
Refresh this page and you should see your package.