build: Add some required modules for node

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+[![npm][npm]][npm-url]
+[![node][node]][node-url]
+[![deps][deps]][deps-url]
+[![tests][tests]][tests-url]
+[![coverage][cover]][cover-url]
+[![code style][style]][style-url]
+[![chat][chat]][chat-url]
+
+<div align="center">
+  <img width="100" height="100" title="Load Options" src="http://michael-ciniawsky.github.io/postcss-load-options/logo.svg">
+  <a href="https://github.com/postcss/postcss">
+    <img width="110" height="110" title="PostCSS"           src="http://postcss.github.io/postcss/logo.svg" hspace="10">
+  </a>
+  <img width="100" height="100" title="Load Plugins" src="http://michael-ciniawsky.github.io/postcss-load-plugins/logo.svg">
+  <h1>Load Config</h1>
+</div>
+
+<h2 align="center">Install</h2>
+
+```bash
+npm i -D postcss-load-config
+```
+
+<h2 align="center">Usage</h2>
+
+```
+npm i -S|-D postcss-plugin
+```
+
+Install plugins and save them to your ***package.json*** dependencies/devDependencies.
+
+### `package.json`
+
+Create **`postcss`** section in your projects **`package.json`**.
+
+```
+App
+  |– client
+  |– public
+  |
+  |- package.json
+```
+
+```json
+{
+  "postcss": {
+    "parser": "sugarss",
+    "map": false,
+    "from": "/path/to/src.sss",
+    "to": "/path/to/dest.css",
+    "plugins": {
+      "postcss-plugin": {}
+    }
+  }
+}
+```
+
+### `.postcssrc`
+
+Create a **`.postcssrc`** file in JSON or YAML format.
+
+It's also allowed to use extensions (**`.postcssrc.json`** or **`.postcssrc.yaml`**). That could help your text editor to properly interpret the file.
+
+```
+App
+  |– client
+  |– public
+  |
+  |- (.postcssrc|.postcssrc.json|.postcssrc.yaml)
+  |- package.json
+```
+
+**`JSON`**
+```json
+{
+  "parser": "sugarss",
+  "map": false,
+  "from": "/path/to/src.sss",
+  "to": "/path/to/dest.css",
+  "plugins": {
+    "postcss-plugin": {}
+  }
+}
+```
+
+**`YAML`**
+```yaml
+parser: sugarss
+map: false
+from: "/path/to/src.sss"
+to: "/path/to/dest.css"
+plugins:
+  postcss-plugin: {}
+```
+
+### `postcss.config.js` or `.postcssrc.js`
+
+You may need some JavaScript logic to generate your config. For this case you can use a file named **`postcss.config.js`** or **`.postcssrc.js`**.
+
+```
+App
+  |– client
+  |– public
+  |
+  |- (postcss.config.js|.postcssrc.js)
+  |- package.json
+```
+
+You can export the config as an `{Object}`
+
+```js
+module.exports = {
+  parser: 'sugarss',
+  map: false,
+  from: '/path/to/src.sss',
+  to: '/path/to/dest.css',
+  plugins: {
+    'postcss-plugin': {}
+  }
+}
+```
+
+Or export a `{Function}` that returns the config (more about the param `ctx` below)
+
+```js
+module.exports = (ctx) => ({
+  parser: ctx.parser ? 'sugarss' : false,
+  map: ctx.env === 'development' ? ctx.map : false,
+  from: ctx.from,
+  to: ctx.to,
+  plugins: {
+    'postcss-plugin': ctx.plugin
+  }
+})
+```
+
+Plugins can be loaded in either using an `{Object}` or an `{Array}`.
+
+##### `{Object}`
+
+```js
+module.exports = (ctx) => ({
+  ...options
+  plugins: {
+    'postcss-plugin': ctx.plugin
+  }
+})
+```
+
+##### `{Array}`
+
+```js
+module.exports = (ctx) => ({
+  ...options
+  plugins: [
+    require('postcss-plugin')(ctx.plugin)
+  ]
+})
+```
+> :warning: When using an Array, make sure to `require()` them.
+
+<h2 align="center">Options</h2>
+
+**`parser`**:
+
+```js
+'parser': 'sugarss'
+```
+
+**`syntax`**:
+
+```js
+'syntax': 'postcss-scss'
+```
+**`stringifier`**:
+
+```js
+'stringifier': 'midas'
+```
+
+[**`map`**:](https://github.com/postcss/postcss/blob/master/docs/source-maps.md)
+
+```js
+'map': 'inline'
+```
+
+**`from`**:
+
+```js
+from: 'path/to/src.css'
+```
+
+**`to`**:
+
+```js
+to: 'path/to/dest.css'
+```
+
+<h2 align="center">Plugins</h2>
+
+### Options
+
+**`{} || null`**: Plugin loads with defaults.
+
+```js
+'postcss-plugin': {} || null
+```
+> :warning: `{}` must be an **empty** object
+
+**`[Object]`**: Plugin loads with given options.
+
+```js
+'postcss-plugin': { option: '', option: '' }
+```
+
+**`false`**: Plugin will not be loaded.
+
+```js
+'postcss-plugin': false
+```
+
+### Order
+
+Plugin **order** is determined by declaration in the plugins section.
+
+```js
+{
+  plugins: {
+    'postcss-plugin': {}, // plugins[0]
+    'postcss-plugin': {}, // plugins[1]
+    'postcss-plugin': {}  // plugins[2]
+  }
+}
+```
+
+<h2 align="center">Context</h2>
+
+When using a function (`postcss.config.js` or `.postcssrc.js`), it is possible to pass context to `postcss-load-config`, which will be evaluated while loading your config. By default `ctx.env (process.env.NODE_ENV)` and `ctx.cwd (process.cwd())` are available.
+
+<h2 align="center">Examples</h2>
+
+**postcss.config.js**
+
+```js
+module.exports = (ctx) => ({
+  parser: ctx.parser ? 'sugarss' : false,
+  map: ctx.env === 'development' ? ctx.map : false,
+  plugins: {
+    'postcss-import': {},
+    'postcss-nested': {},
+    cssnano: ctx.env === 'production' ? {} : false
+  }
+})
+```
+
+### <img width="80" height="80" src="https://worldvectorlogo.com/logos/nodejs-icon.svg">
+
+```json
+"scripts": {
+  "build": "NODE_ENV=production node postcss",
+  "start": "NODE_ENV=development node postcss"
+}
+```
+
+```js
+const { readFileSync } = require('fs')
+
+const postcss = require('postcss')
+const postcssrc = require('postcss-load-config')
+
+const css = readFileSync('index.sss', 'utf8')
+
+const ctx = { parser: true, map: 'inline' }
+
+postcssrc(ctx).then(({ plugins, options }) => {
+  postcss(plugins)
+    .process(css, options)
+    .then((result) => console.log(result.css))
+})
+```
+
+### <img width="80" height="80" src="https://worldvectorlogo.com/logos/gulp.svg">
+
+```json
+"scripts": {
+  "build": "NODE_ENV=production gulp",
+  "start": "NODE_ENV=development gulp"
+}
+```
+
+```js
+const { task, src, dest, series, watch } = require('gulp')
+
+const postcss = require('gulp-postcssrc')
+
+const css = () => {
+  src('src/*.css')
+    .pipe(postcss())
+    .pipe(dest('dest'))
+})
+
+task('watch', () => {
+  watch(['src/*.css', 'postcss.config.js'], css)
+})
+
+task('default', series(css, 'watch'))
+```
+
+### <img width="80" height="80" src="https://worldvectorlogo.com/logos/webpack.svg">
+
+```json
+"scripts": {
+  "build": "NODE_ENV=production webpack",
+  "start": "NODE_ENV=development webpack-dev-server"
+}
+```
+
+```js
+module.exports = (env) => ({
+  module: {
+    rules: [
+      {
+        test: /\.css$/
+        use: [
+          'style-loader',
+          {
+            loader: 'css-loader',
+            options: { importLoaders: 1 } }
+          },
+          'postcss-loader'
+        ]
+      }
+    ]
+  }
+})
+```
+
+<h2 align="center">Maintainers</h2>
+
+<table>
+  <tbody>
+   <tr>
+    <td align="center">
+      <img width="150 height="150"
+        src="https://avatars.githubusercontent.com/u/5419992?v=3&s=150">
+      <br />
+      <a href="https://github.com/michael-ciniawsky">Michael Ciniawsky</a>
+    </td>
+    <td align="center">
+      <img width="150 height="150"
+        src="https://avatars.githubusercontent.com/u/2437969?v=3&s=150">
+      <br />
+      <a href="https://github.com/ertrzyiks">Mateusz Derks</a>
+    </td>
+  </tr>
+  <tbody>
+</table>
+
+<h2 align="center">Contributors</h2>
+
+<table>
+  <tbody>
+   <tr>
+    <td align="center">
+      <img width="150" height="150"
+        src="https://avatars.githubusercontent.com/u/1483538?v=3&s=150">
+      <br />
+      <a href="https://github.com/sparty02">Ryan Dunckel</a>
+    </td>
+    <td align="center">
+      <img width="150" height="150"
+        src="https://avatars.githubusercontent.com/u/6249643?v=3&s=150">
+      <br />
+      <a href="https://github.com/pcgilday">Patrick Gilday</a>
+    </td>
+    <td align="center">
+      <img width="150" height="150"
+        src="https://avatars.githubusercontent.com/u/5603632?v=3&s=150">
+      <br />
+      <a href="https://github.com/daltones">Dalton Santos</a>
+    </td>
+  </tr>
+  <tbody>
+</table>
+
+[npm]: https://img.shields.io/npm/v/postcss-load-config.svg
+[npm-url]: https://npmjs.com/package/postcss-load-config
+
+[node]: https://img.shields.io/node/v/postcss-load-plugins.svg
+[node-url]: https://nodejs.org/
+
+[deps]: https://david-dm.org/michael-ciniawsky/postcss-load-config.svg
+[deps-url]: https://david-dm.org/michael-ciniawsky/postcss-load-config
+
+[style]: https://img.shields.io/badge/code%20style-standard-yellow.svg
+[style-url]: http://standardjs.com/
+
+[tests]: http://img.shields.io/travis/michael-ciniawsky/postcss-load-config.svg
+[tests-url]: https://travis-ci.org/michael-ciniawsky/postcss-load-config
+
+[cover]: https://coveralls.io/repos/github/michael-ciniawsky/postcss-load-config/badge.svg
+[cover-url]: https://coveralls.io/github/michael-ciniawsky/postcss-load-config
+
+[chat]: https://img.shields.io/gitter/room/postcss/postcss.svg
+[chat-url]: https://gitter.im/postcss/postcss