Prerequities:
* A server running Ubuntu 18.04 with a non-root user and firewall enabled.
DigitalOcean have a good setup guide
[https://www.digitalocean.com/community/tutorials/initial-server-setup-with-ubuntu-18-04]
.
* A registered domain name with the correct DNS settings
* An existing React App
Nginx
Install:
sudo apt install nginx
Adjust firewall to allow