title: Express.js - How to set a header to all responses
body: <p>I am using Express for web services and I need the responses to be encoded in utf-8.</p>
  
  <p>I know I can do the following to each response:</p>
  
  <pre><code>response.setHeader('charset', 'utf-8');
  </code></pre>
  
  <p>Is there a clean way to set a header or a charset for all responses sent by the express application?</p>