https://shopify.dev/tutorials !important
There are 3 types of Apps we can create;
To begin, log in to the partner account and click on Apps in the left navigation.
https://shopify.dev/tutorials/build-a-shopify-app-with-node-and-react
Authentication is done in server.js which needs to be in the root.
In the partner page -> Apps -> Select the app to change -> Extensions (on the top) -> Manage Embedded Apps -> Navigation[Configure]