Identify learning objectives, key points, and framing questions for each lesson

[aculich]

For each of our lessons, let's follow the Carpentries recommendations to identify learning objectives, key points, and framing questions. See these documents:

• https://cdh.carpentries.org/developing-content.html#supporting-elements
• http://swcarpentry.github.io/swc-releases/2016.06/instructor-training/20-lessons/

For example:

Add learning objectives to each lesson:

• [ ] encryption.md
• [ ] passwords.md
• [ ] mfa.md

[EastBayEv]

Excellent suggestion, please ping me here if I can be of help or provide feedback.