add app.router to static-files example

examples/static-files/index.js

@@ -28,6 +28,14 @@ app.use('/static', express.static(__dirname + '/public'));
 // this will allow "GET /style.css" instead of "GET /css/style.css":
 app.use(express.static(__dirname + '/public/css'));
 
+// this examples does not have any routes, however
+// you may `app.use(app.router)` before or after these
+// static() middleware. If placed before them your routes
+// will be matched BEFORE file serving takes place. If placed
+// after as shown here then file serving is performed BEFORE
+// any routes are hit:
+app.use(app.router);
+
 app.listen(3000);
 console.log('listening on port 3000');
 console.log('try:');