Updated docker file

Dockerfile

@@ -23,7 +23,9 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY . .
 
 # Expose port
-EXPOSE 5000
+EXPOSE 7860
 
+ENV PYTHONUNBUFFERED=1
+ENV FLASK_APP=app.py
 # Start Flask app using gunicorn
-CMD ["gunicorn", "main:app", "--bind", "0.0.0.0:5000"]
+CMD ["python", "app.py"]