title: How do I redirect all unmatched urls with Express?
body: <p>I want to redirect all unmatched urls to my homepage. Ie. someone goes to <code>www.mysite.com/blah/blah/blah/foo/bar</code> or <code>www.mysite.com/invalid_url</code> - I want to redirect them to <code>www.mysite.com</code></p>
  
  <p>Obviously I don't want to interfere with my valid urls.</p>
  
  <p>So is there some wildcard matcher that I can use to redirect requests to these invalid urls?</p>