Additional YAML doc when mentioning it in workshops

[webknjaz]

This one is good for quick start: https://learnxinyminutes.com/docs/yaml/

[tima]

During a community presentation of this content @dagwieers suggested we also add links to the Wikipedia YAML page: https://en.wikipedia.org/wiki/YAML

[dagwieers]

I really like the Wikipedia example as it is pretty straightforward and it gives 2 separate examples for the use of YAML that are easy to understand. One is for LASIK eye surgery (YAML describes a workflow for instructing the equipment, much like what a playbook does), whereas the other is a simple invoice for a shop.

So while YAML simply describes data-structures, how it is applied is up to the user.

I usually quickly go over the different data-types so they have an understanding how it works (also incl. JSON support), then show how YAML implies datatypes (so one understands when quotes are needed, and when not) and then go over both examples. It takes a few minutes but it is essential that people have this understanding before actually going into more complex examples.

The advantage of using the Wikipedia page is that people can quickly refresh their memory by going to Wikipedia, which is readily available. An accessible resource for something that is essential to get right.