Quick readme on how to write/dev docs

docs/README.md

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+# How To: Documentation Step-by-Step
+
+We use [GitBook](https://www.gitbook.com/) to create our documentation. It primarily uses markdown, html, css, js, misc. plugins, and configuration to generate high quality, easy to read, and easy to maintain documentation.
+
+## Getting Started
+
+_Requirements:_
+
+Make sure you have the [`gitbook-cli`](https://www.npmjs.com/package/gitbook-cli) installed globally:
+
+> `npm install -g gitbook-cli`
+
+### Editing and Previewing Changes
+
+Currently, you can only edit and preview a single "book" at a time. We maintain one "book" per API major version. You can find each version's book at:
+
+_Past Versions:_
+
+- Template:
+  - `<project-root>/docs/v<versionNumber>`
+- Examples:
+  - `/docs/v1`
+  - `/docs/v2`
+
+_Latest Version:_
+
+The latest version will always be located in `/docs/latest`
+
+_Live Preview:_
+
+In your terminal / command prompt:
+
+```bash
+cd /docs/latest
+gitbook install
+gitbook serve
+```
+
+Which should generate output like:
+
+> starting server...
+> serving book on http://localhost:4000
+
+Navigating to the the provided URL will show a preview of what the generated book should look like. Any edits you make to the book's markdown files should automatically update in your browser.
+
+### Publishing