This app is a result of following a tutorial from digitalocean.com. Credits to the author Chuks Opia and editor Timothy Nolan.
This tutorial teaches the interaction between React and Rails, as well as basic CRUD (U is left as exercise for the reader as per comment_83195.
[5/1/2021] There seems to be a bug, when viewing all recipes, clicking back shows an empty page. Following comment_91406, one solution was to use turbolink. The fix is also applied (can be found in app/javascript/packs/Index.jsx)