This App is for running any kind of Jenkins server inside Jenkins X.
This App is intended to be used with the --ng kind of Jenkins X cluster so that traditional Jenkins X build packs will default to using tekton pipelines and then any traditional Jenkinsfile based pipelines will be delegated to this Jenkins App.
The Jenkins App can be installed by running:
jx add app jx-app-jenkins
It will ask you what plugins you want to add to the Jenkins server when you install the app.