We'll create fresh WordPress site with Redirect Front-end to Login | Headless WP installed. You have 20 minutes to test the plugin after that site we'll be deleted.
Using WordPress entirely as a CMS (a Headless WordPress) is a plausible option for people building web apps using technologies such as React JS or Angular JS to entirely build their front-end.
Doing this, the front-end (e.g. built with React) becomes decoupled from the back-end (e.g. WordPress). Since WordPress is being used strictly to manage and serve the content via REST API, the WP front-end becomes unusable and unnecessary – hence the term “headless WordPress”.
This plugin essentially removes the front-end of WordPress.
Note that the REST API, and other non-front-end stuff should work as normal.