title: What is "entry point" in npm init
body: <p>I have an empty new project, when i run npm init i got a list of questions to answer, for example:</p>
  
  <pre><code>name: (karma)
  version: (1.0.0)
  description:my project description
  entry point: (index.js)
  </code></pre>
  
  <p>I am really confused about the one that says "entry point", Should this be my index.html file or my app.js or is it something else?</p>