This setup allows for a Node/Express/React app which can be easily deployed to Heroku.
The front-end React app will auto-reload as it's updated via webpack dev server, and the backend Express app will auto-reload independently with nodemon.
Start by installing front and backend dependencies. While in this directory, run the following command:
yarn install
This should install node modules within the server and the client folder.
After both installations complete, run the following command in your terminal:
yarn start
Your app should now be running on http://localhost:3000. The Express server should intercept any AJAX requests from the client.
To deploy, simply add and commit your changes, and push to Heroku. As is, the NPM scripts should take care of the rest. Note: you need to check in your yarn.lock file so Heroku knows to run yarn.