title: How can I automatically scale down to zero instances and scale up when someone does a request
body: <p>I am running an application with multiple environments which are not always required. Ideally, <em>[to save some cost]</em> I would love to instances count to automatically decrease to zero (say an hour of inactivity), and once requests start coming scale up and start increasing instances count to serve requests.</p>
  <p>In other words - could autoscale group or anything else within AWS EB (except API) create the first instance?</p>