docs: update intial restructuring for guide articles

docs/how-to-work-on-coding-challenges.md

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+# How to work on coding challenges
+
+### Changing on GitHub
+
+Each challenge is stored in it's own markdown file. That makes it easy to edit challenges right from within GitHub.
+
+You can make a change without having anything running on your local system.
+
+After you find the file you want to modify within the GitHub interface, click the pencil icon to start editing the file. This will automatically create a fork of the project, if you don't have one already.
+
+You can also clone the project and edit locally on you computer. For help with that, read the main [contributing guide](/CONTRIBUTING.md).
+
+### Challenge Template
+
+Here is a template of what the challenge markdown files look like.
+
+````md
+---
+id: Unique identifier (alphanumerical, MongoDB _id)
+title: Challenge Title
+challengeType: 0
+guideUrl: 'url of guide article'
+videoUrl: 'url of video explaination'
+---
+
+## Description
+<section id='description'>
+A Description of the challenge and what is required to pass
+</section>
+
+## Instructions
+<section id='instructions'>
+Instructions about what exactly needs to be done.
+</section>
+## Tests
+<section id='tests'>
+
+``` yml
+- text: Should return "foo".
+  testString: 'A stringified function using Chai asserts'
+```
+
+</section>
+
+<div id='js-seed'>
+
+```js
+Code desplayed in the editor by default.
+```
+
+</div>
+
+### Before Test
+<div id='js-setup'>
+
+```js
+Test setup code.
+```
+
+</div>
+
+</section>
+
+### After Test
+<div id='js-teardown'>
+
+```js
+Test tear down code.
+```
+
+</div>
+
+</section>
+
+## Solution
+<section id='solution'>
+
+```js
+Challenge solution code.
+```
+
+</section>
+````
+
+### Useful Links
+
+Creating and Editing Challenges:
+
+1. [Challenge Style Guide](style-guide-for-curriclum-challenges.md) - how to create and format challenges
+
+2. [Challenge types](https://github.com/freeCodeCamp/learn/blob/a5cb25704168aa37f59a582f0bb5a19b7bd89b46/utils/challengeTypes.js) - what the numeric challenge type values mean (enum).
+
+3. [Contributing to FreeCodeCamp - Writing ES6 Challenge Tests ](https://www.youtube.com/watch?v=iOdD84OSfAE#t=2h49m55s) - a video following [Ethan Arrowood](https://twitter.com/ArrowoodTech) as he contributes to the old version of the curriculum