title: npm run build hangs no matter what, cannot upgrade webpack
body: <p>I cloned a react repository and would like to run it. However, <code>npm run build</code> and <code>npm start</code> hang indefinitely.  </p>
  
  <p>I am trying to run the application on a CentOS 7 server which I access via ssh.</p>
  
  <p>I am running: </p>
  
  <p><code>npm install</code></p>
  
  <p>and then </p>
  
  <p><code>npm run build</code> or <code>npm start</code></p>
  
  <p>Here is what I see:</p>
  
  <pre><code>my-project@ build /local/scratch/my-project/app
  webpack --mode development --progress
  </code></pre>
  
  <p>The progress does not seem to display. 
  I tried updating webpack with:</p>
  
  <p><code>npm install --global webpack@4.29.6</code></p>
  
  <p>I know that I need version 4.29.6 or higher. When I run this:</p>
  
  <p><code>npm webpack --version</code></p>
  
  <p>I still see version 3.10.10. My package.json file references version 4.29.6. </p>
  
  <p>What should I try next?</p>
  
  <p>Please let me know if I need to provide more information.</p>