Running Alpine in a Docker Container
Some things you might want to know if you're running Alpine in a Docker container.
using mkinitfs
By default mkinitfs will use the running kernel to build the initfs. Since your Docker container is under some other kernel you need to specify this manually.
apk add linux-vanilla
cat /usr/share/kernel/vanilla/kernel.release
mkinitfs 4.19.41-0-vanilla
mkinitfs `cat /usr/share/kernel/vanilla/kernel.release`