After installing npm and node you can easily create a react app and deploy in to any platform,Here I’m using firebase.
Install create-react-app
npm install -g create-react-app
create-react-app my-new-app
cd my-new-app
npm start
Then open http://localhost:3000 to see your app.
Create free accout in firebase and create a repository.
Login into firebase
npm install -g firebase-tools
firebase login
It will redirect to a link in browser,After clicking the link you are logged into firebase.
Inside your app directory
firebase init
It will ask to choose some option like selecting firebase repo to host. After finishing this configuration you can find firebase.json in your app.
one more command is more to deploy your app in to firebase
firebase deploy
finally your got hosted in firebase like my-new-app.firebase.com
Happy Coding ;)