Following recent changes around the usage of l2sm-network, the ping pong example has been updated to showcase how the networks are defined

Added screencast video on youtube that follows the guide procedure, to ease the user's understanding of the cdn example.

Added documentation to the examples section, for the cdn example and the build section, specifying how to use the build and push script

Added a working example of the L2S-M usage, showcasing the benefits of using L2S-M in isolating Pods

Typo fix