Good start, but there are many, many things that should be improved if you are running this as a production setup.

Including node & PM2 update to the latest, running PM2 as a systemd service, or simply ditching PM2 altogether, as well as backups, performance settings, and monitoring, log rotation, and cleanup, etc.

Beware of using the same server for running the apps and for building the app. Quite often, building the app needs a lot of RAM and CPU, so it is undesirable to do it on the same host.