Install jenkins from the source package repositories and start it up.

Add a jenkins nginx entry. It depends on the nginx formula being installed and requires manual inclusion nginx and jenkins states in your top.sls to function, in this order: jenkins, nginx, jenkins.nginx.

jenkins:
  lookup:
    port: 80
    home: /usr/local/jenkins
    user: jenkins
    group: www-data
    server_name: ci.example.com