web.config

<configuration>
    <system.webServer>
      <!-- indicates that the server.js file is a node.js application 
      to be handled by the iisnode module -->
      <handlers>
        <add name="iisnode" path="server.js" verb="*" modules="iisnode" />
      </handlers>
      <!-- use URL rewriting to redirect the entire branch of the URL namespace
      to server.js node.js application; for example, the following URLs will 
      all be handled by server.js:
      
          http://localhost/node/urlrewrite/server
          http://localhost/node/urlrewrite/server/foo
          http://localhost/node/urlrewrite/server/foo/bar/baz?param=bat
      -->    
      <rewrite>
        <rules>
          <rule name="server">
            <match url="/*" />
            <action type="Rewrite" url="server.js" />
          </rule>
        </rules>
      </rewrite>
    </system.webServer>
  </configuration>