Using yarn causes problems in VSCode

[toddobryan]

Created a new project using yarn following the instructions and VSCode can't find any packages. Pretty much everything in an import in both the server and client folders is underlined in red.

Switched to npm and the errors go away.

Where is the setting that makes it clear that import express from "express"; should actually be looking in "../../node_modules" for express, because it looks like the combination of yarn and VSCode isn't getting the message.