title: UnhandledPromiseRejectionWarning: Error: ENOTEMPTY: directory not empty
body: <p>I have been troubling to make the build on running <code>npm run build</code>.</p>
  <p>I am getting</p>
  <blockquote>
  <p>UnhandledPromiseRejectionWarning: Error: ENOTEMPTY: directory not
  empty,rmdir
  '/var/www/html/abhinav/png-react/png-compressor/build/static'</p>
  </blockquote>