fixing formatting for section 2.3

Signed-off-by: Mano Marks <mano.marks@gmail.com>

Author: ManoMarks

beginner/chapters/webapps.md

@@ -130,6 +130,7 @@ Then there are two more types of images that can be both base and child images,
 
 ### 2.3 Our First Image
 _The code for this section is in this repository in the [flask-app](https://github.com/docker/labs/tree/master/beginner/flask-app) directory_
+
 Now that you have a better understanding of images, it's time to create our own. Our goal in this section will be to create an image that sandboxes a small [Flask](http://flask.pocoo.org) application.
 For the purposes of this workshop, we'll created a fun little Python Flask app that displays a random cat `.gif` every time it is loaded - because you know, who doesn't like cats?