title: Difference between `npm start` & `node app.js`, when starting app?
body: <p>I have installed an application using the command <code>express new 'filename'</code>.  I have just learned that you can start an application using:</p>
  
  <pre><code>npm start
  </code></pre>
  
  <p>Thus far I have used:</p>
  
  <pre><code>node app.js
  </code></pre>
  
  <p>to start my server. Anyone know what the difference is between the two? Thanks.</p>