See also: https://phabricator.wikimedia.org/T220402#5133994

A requirement of having the service deployed is having a basic info endpoint. Apparently this is not free from service-runner but is in included in service-template-node (which we aren't using).

This should be exposed on <host>/_info. See this from the service-runner-template https://github.com/wikimedia/service-template-node/blob/master/routes/info.js