How to deploy this project?

Just completed V3. Absolutely great course. However there is one aspect that is not clear to me.

I'm very confused about how should I put this project online.

The build that we get in public folder (as Brian taught in the course - Building for Production) doesn't have any index.html , so I'm a little confused (And if I manually copy the index.html from root to public - it doesn't work).
Generally in create-react-app projects on doing build we get a public/dist folder that can be uploaded to hosting services.
Also in this project after applying server-side rendering we have a server.js too, do we need to host the server and client seperately?
How should I proceed if want this project online?