title: Module not found: Can't resolve './registerServiceWorker
body: <p>I'm having truoble when I'm trying to compile my react application.
  When I'm compilie the application I'm recieveing the following error:
  <code>Module not found: Can't resolve './registerServiceWorker</code></p>
  
  <p>This is my index.js file:</p>
  
  <pre><code>import React from 'react';
  import ReactDOM from 'react-dom';
  import ApolloClient from "apollo-boost"
  import {ApolloProvider} from "react-apollo"
  import App from './App';
  import registerServiceWorker from './registerServiceWorker';
  
  const client = new ApolloClient({
     uri: "http://localhost:4000"
  });
  
  ReactDOM.render(
  &lt;ApolloProvider client={client}&gt;
      &lt;App /&gt;
      &lt;/ApolloProvider&gt;,
      document.getElementById('root')
      );
  registerServiceWorker();
  </code></pre>
  
  <p>I've used create-react-app, and I removed some not used files:</p>
  
  <pre><code>App.test.js
  App.css
  index.css
  logo.svg
  </code></pre>
  
  <p>I think that this is the cause of the issue, but I can't locate the source of this issue.</p>
  
  <p>Thanks in advance!</p>