It's good info as far as Dockerizing the build process of a React app, but there isn't much deploying happening in this article. docker-compose isn't really used for deployment (unless you're one of the 3 people using Swarm).

I think the deployment story for for React apps is monopolized by all the at-the-edge startups, and they don't run containers(?). Even Fly.io doesn't run containers (you make a Docker image as your "deployment artifact", and Fly creates a Firecracker-friendly VM from it).