📝 Add installation to README

Author: markbrouch

README.md

@@ -1,11 +1,29 @@
 # wml-coding-std
 A module for keeping consistent JS coding standards at WML
 
+## Installation
+First install the package:
+```bash
+npm i wml-coding-std
+```
+Then setup appropriate `.eslintrc` file(s) in your project. The [`eslint-config-walmart`](https://github.com/walmartlabs/eslint-config-walmart) package has several options available.
+
+You'll also want to extend `eslint-config-prettier` and `eslint-plugin-react` after extending `eslint-config-walmart` (all included in this package) to make it Prettier-compatible:
+```js
+{
+  "extends": [
+    "walmart",
+    "prettier",
+    "prettier/react"
+  ]
+}
+```
+
+## Rationale
 Given that we are rapidly adopting prettier to do pure style formatting, we need a new approach to keeping a consistent coding standard.  The solution proposed is to create a new module `wml-coding-std`, that does this:
-- includes eslint, eslint-config-walmart
+- includes eslint, eslint-config-walmart, prettier eslint config overrides
 - includes prettier
-- includes npm postinstall scripts to: 
-  1. setup .eslintrc for the host
-  2. setup npm tasks for prettier
-  3. setup git hooks for prettier
+- includes npm postinstall scripts to:
+  1. setup npm tasks for prettier
+  1. setup git hooks for prettier
 - includes a task that user can invoke manually to format all `js,jsx` code under all directories except the usual suspects like `node_modules`, `dist`, `coverage`