title: How to inject custom meta tags in html-webpack-plugin?
body: <p>I use Webpack along with the plugin <code>html-webpack-plugin</code>. Based on an environment variable, I want to inject a <code>&lt;meta&gt;&lt;/meta&gt;</code> tag into the final <code>index.html</code> file.</p>
  
  <p>How do I do this?</p>