Be able to show images in the tutorial

[tomdng]

When writing tutorials that are a little less code based, like a tutorial for installing all the necessary packages and downloading repos, it would be helpful to have images.

So after the MVP for Propguard gets built, this would be a neat little feature to be added.

Whoever adds this feature will determine where and how images get displayed, as well as figure out how to maximize/shrink the image if needed to.