Update Dockerfile

Dockerfile

@@ -4,7 +4,7 @@ FROM python:3.9-slim
 # Set environment variables
 ENV FLASK_APP=app.py
 ENV FLASK_RUN_HOST=0.0.0.0
-# Note: FLASK_RUN_PORT is not used by Gunicorn, it's kept for possible future reference.
+ENV FLASK_RUN_PORT=80
 
 # Install ffmpeg and other dependencies
 RUN apt-get update && \
@@ -24,5 +24,5 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Expose the port on which the app will run
 EXPOSE 80
 
-# Run the Flask app with Gunicorn
-CMD ["gunicorn", "--bind", "0.0.0.0:80", "app:app"]
+# Run the Flask app
+CMD ["flask", "run"]