app/run.py

import sys
from os.path import dirname, abspath

# Add the directory of the 'treat' folder to the system path
sys.path.append(abspath(dirname(__file__)) + "/treat")

# Import the Flask app from the app module
from app import app

if __name__ == '__main__':
    # Run the Flask app with debug mode enabled
    app.run(debug=True)