Webpack assets are not compiled in production
Visiting the /xui page in nightly, for example, results in an error 'Can't find entry point 'katello' in webpack manifest'.
This means the new Red Hat repos page will fail with the same error.
From what I see in foreman-packaging, the katello spec does not have any dependencies on any npm package. I would ensure the spec contains the npm dependencies specified in package.json, then call `foreman-rake webpack:compile` after installing.