build react app

1npx create-react-app my-app
2cd my-app
3npm start

1// Go into the folder where you wish to create your app
2yarn create react-app appname

1npx create-react-app app-name
2cd app-name
3npm start

1npx create-react-app project-name

1yarn create react-app my-appCopied

1npx create-react-app my-app
2cd my-app
3yarn start