The M, in MERN stack development usually alludes to a NoSQL datastore! Either, or both, the technology selection and the
Express, Connect, Next, and many other middleware choices are available for processing API and Page requests.
ReactJS is a powerful templating language for both Server Side and Single Page Application
NodeJS is the JavaScript runtime and ecosystem that is most popular with Enterprise Organizations who are moving towards a unified human to computer interface.
True full stack web development is possible when developers no loger need to switch between front end and back end contexts, and can focus, building momentum and efficiency, on the deliverable product.
Its also the perfect way to customize a web server to process requests for all your API or rendering endpoints. Spefically invented to be a fast HTTP server, our network uses it as an application server behind NGINX.