title: Setting Up a config file for PostCSS
body: <p>I'm  using PostCSS and I want to add Post-uncss. I use no task runners, just Postcss-cli. My package.json looks like this right now:</p>
  
  <pre><code>"css-clean": "npx postcss src\\css\\main.css -u autoprefixer --replace &amp;&amp; npx postcss src\\css\\main.css -u css-declaration-sorter --replace --no-map"
  </code></pre>
  
  <p>It's getting rather long. I saw mentioned that PostCSS can have a config file "postcss.config.js". The only thing mentioned in the article is the skeleton:</p>
  
  <pre><code>module.exports = {
      plugins: {
        'autoprefixer': {},
        'css-declaration-sorter': {}
      }
    };
  </code></pre>
  
  <p>The uncss documentation just says for options:</p>
  
  <pre><code>{
    html: ['index.html', 'about.html', 'team/*.html'],
    ignore: ['.fade']
  }
  </code></pre>
  
  <p>I was hoping if someone has experience with using the config file to give some advice because I don't believe this feature is well documented. </p>