Update README.md

Author: perkinsjr

README.md

@@ -65,10 +65,11 @@ pnpm db-push
 
 ### Configure Expo app
 
-Expo doesn't use the .env for the publishable key, so you will need to go to `/apps/expo/src/constants.ts` and add it there.
+Expo doesn't use the .env for the publishable key, so you will need to go to `apps/expo/app.config.ts` and add it there.
 
 ```
-export const CLERK_PUBLISHABLE_KEY = your_publishable_key;
+const CLERK_PUBLISHABLE_KEY = "your-clerk-publishable-key";
+
 ```
 
 ### Configure Expo `dev`-script