xvfb package shoud include 'xvfb-run' script
Both Ubuntu and Arch Linux include the ‘xvfb-run’ wrapper script in
their xvfb package.
This script is quite useful for running graphical application on a
headless server, but Alpine Linux does not currently include it in the
‘xvfb’ package.
The script can be found at https://git.archlinux.org/svntogit/packages.git/tree/trunk/xvfb-run?h=packages/xorg-server
(from redmine: issue id 9617, created on 2018-11-02)