Create a configuration.rb file like this:
set :hudson, "https://server/hudson"
set :project, "ProjectName"
Copy your certificate into this directory and name it 'certificate.pem'
Execute the launch script which will run rackup with nohup so it launches again after a crash.
./launch
You can also set an http proxy before you launch
export http_proxy=http://path-to-proxy:port
./launch
The monitor is available at http://localhost:9292/.