Add more details to env setup docs (Expo)

apps/website/docs/learn/02-environment-setup.md

@@ -37,6 +37,7 @@ function getIsDev(caller) {
 }
 
 module.exports = function (api) {
+  // If not using Expo, set these values manually or by other means
   const platform = api.caller(getPlatform);
   const dev = api.caller(getIsDev);
 
@@ -90,12 +91,25 @@ const projectRoot = __dirname;
 const config = getDefaultConfig(projectRoot);
 // 1. Enable Metro support for symlinks and package exports
 config.resolver.unstable_enablePackageExports = true;
-// 2. Force Metro to resolve (sub)dependencies only from the `nodeModulesPaths`
-config.resolver.disableHierarchicalLookup = true;
+// 2. Only for npm monorepos: force Metro to resolve (sub)dependencies only from the `nodeModulesPaths`
+// config.resolver.disableHierarchicalLookup = true;
 
 module.exports = config;
 ```
 
+TypeScript-based Expo projects should also set `moduleResolution` to `"bundler"`.
+
+```js title="tsconfig.json"
+{
+  "extends": "expo/tsconfig.base",
+  "compilerOptions": {
+    "strict": true,
+    "moduleResolution": "bundler",
+  },
+  ...
+}
+```
+
 ## App files
 
 Your app needs to include a CSS file that contains a `@stylex` directive. This acts as a placeholder that is replaced by the generated CSS during builds.