title: Multiple log files with Winston?
body: <p>We'd like to use Winston for our logging in Node.js. But, we can't figure out how to have two log files: one for just errors, and one for everything else.</p>
  
  <p>Doing this the naive way doesn't work, however: adding multiple <code>winston.transports.File</code> transports gives an error.</p>
  
  <p><a href="https://github.com/flatiron/winston/issues/101" rel="noreferrer">Others have run into this problem, with vague hints of a solution, but no real answer</a>.</p>
  
  <p>Any ideas?</p>