Force rebuild: Add file verification and update Dockerfile comments

Dockerfile

@@ -33,5 +33,5 @@ EXPOSE 7860
 HEALTHCHECK --interval=30s --timeout=30s --start-period=5s --retries=3 \
     CMD curl -f http://localhost:7860/health || exit 1
 
-# Run the application
-CMD ["python", "app.py"]
+# Run the application (updated to use app.py)
+CMD ["sh", "-c", "ls -la app.py && python app.py"]