Show preview image for each demo #74
Description
Current Status
Currently on the home page, when a user visits the Demos section, then he cannot see the preview image for a demo.
Deliverables
Add a preview image for each of the demos on the homepage. Note that all of this has to be backend controlled. Also, if there is no preview image attached to a particular demo, then use a default preview image. You are free to design a default preview image by your own.