title: RegEx help- Express routing url
body: <p>I've read from other Stack Overflow posts that you can use regular expressions to route various URLs. I've never really used RegExps before, so I need some help. How would I route all URLs that begin with /lobby/ followed by ten digits? Like so</p>
  
  <pre><code>app.get("/lobby/0000000000", function (req, res) ...
  </code></pre>
  
  <p>Thanks.</p>