Images tagged with -alpine-XX aren't based on alpine linux

[kvj]

Instead they are based on Ubuntu

kvorobyev@ZALANDO-62321 ~ % docker run --rm -it registry.opensource.zalan.do/stups/node:12.10.0-alpine-49 /bin/bash
root@361b04f36bcb:/# which apt
/usr/bin/apt
root@361b04f36bcb:/# cat /etc/lsb-release 
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.3 LTS"
root@361b04f36bcb:/#

[cberg-zalando]

Thanks for the issue. As the only addition to the official node Docker images are the Zalando CA certificates and they are only required if someone connects to services, which didn't switch to using AWS provided certificates, I would say that the actual of this project is quite limited and it would be better to, if needed, add the Zalando CA certificates using the available npm package on an if needed base and switch to the official Docker node images.