Chart dates are not retained

Currently the packages uploaded to gitlab pages and/or the fileserver are downloaded from the package registry during CI runtime.
This leads to new timestamps for each package whenever the CI is reuploading the packages.

Possible solution: Retreive created_at for each package and version from the API curl -H "PRIVATE-TOKEN: <your_token>" \ "https://gitlab.example.com/api/v4/projects/<project_id>/packages" and overwrite the file timestamp touch -a -m -t 201512180130.09 fileName.ext.