This security issue `CVE-2021-3177` was fixed and the fix is not pushed to dockerhub image.

According to NVD, python v3.8.7 has a critical security issue. I'm using `python:3.8-slim`

NVD link: https://nvd.nist.gov/vuln/detail/CVE-2021-3177
fix: https://github.com/python/cpython/pull/24248
