Update README with .env file setup instructions

Added notes about .env file setup for the app.

README.md

@@ -50,3 +50,12 @@ python3 osce_pipeline.py
 ### 5. Process your Data
 
 When prompted, paste the path of the directory containing the files the app should work on.
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+📝 Notes
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+Make sure your .env file is set up inside the /pipeline folder if the script requires API keys or specific credentials.
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+Use the .env.example file as a template if you're setting this up for the first time.
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