Update README

Author: kylemh

README.md

@@ -1,11 +1,48 @@
 # require-context.macro
 
-A macro needed for some advanced Storybook setups
+A macro needed for some advanced Storybook@4 and Storybook@3 setups
 
 [![Babel Macro](https://img.shields.io/badge/babel--macro-%F0%9F%8E%A3-f5da55.svg?style=flat-square)](https://github.com/kentcdodds/babel-plugin-macros)
 
 Credit to [the original plugin](https://github.com/smrq/babel-plugin-require-context-hook/).
 
 ## Usage
 
-Ensure you have `babel-plugin-macros` installed within your project. Afterwards, simply import this function and call it in place of `require.context()`.
+Ensure you have `babel-plugin-macros` installed within your project.
+
+`yarn add -D babel-plugin-macros`
+
+Then install this specific macro
+
+`yarn add -D require-context.macro`
+
+Afterwards, simply import this function and call it in place of `require.context()` inside
+`.storybook/config.js`.
+
+```javascript
+// .storybook/config.js
+
+import { configure } from '@storybook/react';
+import requireContext from 'require-context.macro';
+
+import '../src/index.css';
+
+const req = requireContext('../src/components', true, /\.stories\.js$/);
+
+function loadStories() {
+  req.keys().forEach((filename) => req(filename));
+}
+
+configure(loadStories, module);
+```
+
+You may also need to make Storybook aware of the fact that you're using Babel macros! You can do
+this by declaring `macros` as one of the options in your array of plugins within your babel config.
+
+One example, with a `.babelrc` at the root-level of your repository:
+
+```json
+{
+  "plugins": ["macros"]
+}
+```