Just like Express, Feathers does not include a logger. It's left up to you how you want to log things and which logger you want to use. However, a Feathers app created using the generator comes with a basic one that uses winston underneath.
A couple other options are bunyan and morgan.
For production it is recommended that you use an error reporting service. Sentry is an amazing one and has a simple Express middleware that you can easily drop in to your Feathers app.
ProTip: Because Feathers extends Express you can use any Express compatible logging middleware with Feathers.