I have set up `create-react-native-app` as said in the `react` native docs. If my project name is `proj`, according to the docs, the commands to be run should be :

```
create-react-native-app proj
cd proj
npm start

```

But when I run `create-react-native-app`, I get a menu to select a blank template or the one with tabs. And instead of `npm` start, it says to use expo start. Why am I getting a different output compared to the docs?