message: Remove template strings in index.js
  It's still better without, is not it ?
  Allows to use the power of winston with `string interpolation`
diff: @@ -9,5 +9,5 @@ process.on('unhandledRejection', (reason, p) =>
  );
  server.on('listening', () =>
  - logger.info(`Feathers application started on ${app.get('host')}:${port}`)
  + logger.info('Feathers application started on %s:%d', app.get('host'), port)
  );
  