Thanks Shekhar. We may need to add the gunicorn package to requirements.txt if you see below error:
2024-06-11T00:29:26.983771768Z File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
2024-06-11T00:29:26.983776468Z File "<frozen importlib._bootstrap>", line 972, in _find_and_load_unlocked
2024-06-11T00:29:26.983808268Z File "<frozen importlib._bootstrap>", line 228, in _call_with_frames_removed
2024-06-11T00:29:26.983813668Z File "<frozen importlib._bootstrap>", line 1030, in _gcd_import
2024-06-11T00:29:26.983818268Z File "<frozen importlib._bootstrap>", line 1007, in _find_and_load
2024-06-11T00:29:26.983822768Z File "<frozen importlib._bootstrap>", line 984, in _find_and_load_unlocked
2024-06-11T00:29:26.983827468Z ModuleNotFoundError: No module named 'aiohttp'
aiohttp is actually should be installed if we have botbuilder-integration-aiohttp package installed. But the default installation of gunicorn might not recognize the packages installed by the build system, hence needs to be installed during build (using requirements.txt)