a_web VS react-without-buildsteps

As mentioned earlier, we will be continuing from a previous blog repo about Webpack basics (optimized branch), so we keep this blog shorter and only include the important details. We had already set up webpack to work well with loaders like post-css and babel. We will only add @babel/preset-react as a dev dependency, update the babel.config.js presets to include this, update webpack.config.js to resolve both .js and .jsx files extension and of course do some cleanup, including deleting files that were specific to that blog, as well as updating the entry and output values (webpack.config.js) to match what we have in the *.libraries.yml.

Our blog is about improvement, so it's better if we start with something to improve upon.I went ahead and made an app and hosted it on heroku, also pushed its code to github (branch name: unoptimized). The final code is also available on github (branch name: optimized).