First, the author is being fooled by false positives due to bad scanner settings. Basically there are a huge number of CVEs that are meaningless, and closed by some distros but not others in the CVE databases. The result is a spew of "OMG LOOK AT THIS BADNESS" which security scanners vendors like because it makes them look useful, but is actually just noise.

Long version: https://pythonspeed.com/articles/docker-security-scanner/

Second, the author isn't installing security updates! You need to run `apt-get upgrade`, even for official images.

Long version: https://pythonspeed.com/articles/security-updates-in-docker/

Third, Alpine has some issues in some cases, although for Go at least neither of these issues is usually relevant so Alpine is fine.

1. musl can be subtly incompatible with some applications, with annoying bugs. Personal experience: if you using minikube in a WeWork office, Alpine-based (or really, musl-based) containers would fail to resolve DNS inside Kubernetes due to a concatenation of circumstances that was mostly the fault of WeWork's ops team but which glibc handled better than musl. The problem has since been fixed by WeWork, AFAIK.

2. For Python specifically, binary precompiled packages (wheels) won't work on Alpine, which means you ahve to recompile the whole universe, which means container builds are slow. There's a PEP which might get this fixed, but for now, not worth it. https://pythonspeed.com/articles/alpine-docker-python/