title: Use Autoprefixer in npm without Gulp
body: <p>Do I need to install all these dependencies and devDependencies to use autoprefixer in node, although I do not use gulp at all?</p>
  
  <p><a href="https://github.com/postcss/autoprefixer/blob/master/package.json">https://github.com/postcss/autoprefixer/blob/master/package.json</a></p>
  
  <p>I want to use it in node like this:</p>
  
  <pre><code>     "scripts": {
         "build:css": "autoprefixer -b 'last 2 versions' &lt;assets/styles/main.css | cssmin &gt; dist/main.css"
       }
  </code></pre>
  
  <p>as described here: <a href="http://blog.keithcirkel.co.uk/how-to-use-npm-as-a-build-tool/">http://blog.keithcirkel.co.uk/how-to-use-npm-as-a-build-tool/</a></p>
  
  <p>But I get an error saying that the system cannot find a file, don´t know which file it means.</p>
  
  <p>I installed it with</p>
  
  <pre><code>npm install autoprefixer --save-dev
  </code></pre>