How to configure custom certificate for docker registry

Issue

x509: certificate signed by unknown authority error comes when the docker registry route is accessed outside the cluster.
How to use a re-encrypt route and custom TLS certificate to expose an existing integrated Docker registry.

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Here are the common uses of Markdown.

Code blocks

~~~
Code surrounded in tildes is easier to read
~~~

Links/URLs

[Red Hat Customer Portal](https://access.redhat.com)