If you have read my another post about creating a ToDo app in react you are good to go; if not see this post.
You know that React App is a single page application containing only static assets. So, you only need to setup a mechanism to serve your static assets like CSS, JS, HTML, IMAGE, etc. files when clients ask for. Either you can use market leader HTTP servers like Apache, Nginx, etc or simple Express server that runs in Node.js.