title: source maps are not present in the build
body: <p>I am using <strong><a href="https://github.com/react-boilerplate/react-boilerplate" rel="nofollow noreferrer">https://github.com/react-boilerplate/react-boilerplate</a></strong> boilerplate for react project
  and I have to integrate sentry for error log reporting.</p>
  <p>For this, I need to upload source-maps on sentry for debugging. The guide which I am following is <a href="https://docs.sentry.io/platforms/javascript/guides/react/config/sourcemaps/#webpack" rel="nofollow noreferrer">https://docs.sentry.io/platforms/javascript/guides/react/config/sourcemaps/#webpack</a></p>
  <p>And I am also using a plugin by sentry <a href="https://github.com/getsentry/sentry-webpack-plugin" rel="nofollow noreferrer">https://github.com/getsentry/sentry-webpack-plugin</a> for automatically uploading source maps when we create build.</p>
  <p>But, when I create build for the project using <code>npm run build</code> there are no source map present in static/js folder.</p>
  <p>As far as I have seen, build contains a static folder which contains which contains html, css, js folders and inside js folder we have chunks and source map files like xyz.js.map.</p>
  <p>So, how do I fix this?</p>