title: Service worker in Gatsby (react.js)
body: <p>I am trying to set up a custom service worker for the gatsby app. The build process of my application takes about 7 minutes and the service worker is registered only in production mode, so I am not able to develop fast. It takes minutes to add for example a new <code>console.log</code> and check it.
  Can I somehow test service worker in development mode?</p>