renovate/lib/modules/datasource/jenkins-plugins/readme.md

The jenkins-plugins datasource supports lookups from the Jenkins Update Center or custom registries.

When you define a custom registry with the registryUrl config option, you must follow Jenkins' update site layout.

The update-center.actual.json and plugin-versions.json files must be in the current path, so Renovate can find them. For example, the files could be put in the https://custom.registry.renovatebot.com/current directory.