How do I host a live version of the Exercise-Tracker web app?

I’ve been following this tutorial on youtube from freeCodeCamp with this title (I can’t post links yet cuz I’m new): Learn the MERN Stack - Full Tutorial (MongoDB, Express, React, Node.js)

The only thing he doesn’t cover is how to deploy this on a live server (he uses localhost with node.js and mongodb backend).

I want to customize this project and make it better to showcase it in my portfolio but I need to host it somewhere so people can play around with it.

i think you can use heroku for this i dont know much about it myself but i know it can host servers, there should be videos on youtube showing how to deploy