Hmm, it seems like this isn’t related to Docker or Ratel at all. Maybe your organization has set up a redirect through a reverse proxy. However, it’s strange that it is redirecting the localhost.
It’s definitely something like this because Ratel doesn’t have TLS capabilities on its own and it doesn’t perform any redirects. It simply cannot do that.
And we are not connected to “Incredibuild” in any way.
It seems like your browser has a valid certificate for localhost. Strange, how did you manage to do that? In theory, you can’t issue certificates for addresses that you don’t own. You can issue certificates as if you were a certificate authority, but they won’t be considered 100% valid.
There is definitely something wrong with your machine or local network.