title: How to check health of docker image running sidekiq
body: <p>I'm using kubernetes on my cluster with several rails / node docker images. Most of them have :3000/healtz health check that simply returns status 200 with OK in body. </p>
  
  <p>Now I'm trying to discover the best way how this health check can be performed on docker image running sidekiq. How I can verify that the worker is running?</p>