Some improvement suggestions for newbie reading the client tutorials (section 5 to 8)

https://www.apollographql.com/docs/tutorial/client.html#react-apollo
- no react and react-dom imports
- where did Pages component came from?

https://www.apollographql.com/docs/tutorial/queries.html#fragments
- LAUNCH_TILE_DATA should be above GET_LAUNCHES
- please mention src/pages/launch.js

https://www.apollographql.com/docs/tutorial/mutations.html#authenticate
- where did resolver and typeDefs came from?

https://www.apollographql.com/docs/tutorial/local-state.html#local-query
- where did injectStyles() came from?

https://www.apollographql.com/docs/tutorial/local-state.html#virtual-fields
- where did GET_CART_ITEMS came from?

https://www.apollographql.com/docs/tutorial/local-state.html#direct-writes
- where did StyledButton component came from?

Review the linked client tutorial sections for React Apollo, fragments, authentication, local queries, virtual fields, and direct writes. Check each listed missing import, component, constant, resolver, typeDefs, or source-file reference against the tutorial context; done means every referenced item is introduced or its location is explained.

Written by the indexing model from the issue text.