Add Historical Examples of Exploits / Compromises

[houllette]

I think it would be super cool to start adding to the various insecurities throughout the modules historical examples of CVEs, public compromises/incidents, etc.

It could be as simple as a link out to other reading, but it could help contextualize the impact and reach a particular issue has in a broader sense.

Example: For the lesson on not allowing code eval in Elixir, link out to maybe an incident a company has had or bug bounty find that allowed for remote code execution.