Resolves #1

This is based on alpine-make-rootfs.

Users usually expect this config to exist (see e.g. #13). However,
we don't enable the networking service by default because it's not
always desirable (think about tiny-cloud, cloud-init, one-context etc.)
It's up to the user to configure networking via script passed to
alpine-make-vm-image.

Resolves #28

Resolves #29

Now it fails on GitHub Actions (f*cking Ubuntu or what?!):

    fetch https://dl-cdn.alpinelinux.org/alpine/latest-stable/main/x86_64/APKINDEX.tar.gz
    6907320:error:1416F086:SSL routines:tls_process_server_certificate:certificate verify failed:ssl/statem/statem_clnt.c:1914:

See-Also: #12

Closes #21

Fixes #12

When using the --script-chroot option, chroot is called with just sh
(relative path), relying on the host environment's $PATH to find the
executable. At least on Arch Linux, this does not work, as Arch Linux
by default does not have /bin in the PATH (/bin is just a symlink to
/usr/bin).

Since the chroot system was just built and it is know to contain
/bin/sh, I think it makes sense to just call it explicitly here.

Related to https://github.com/alpinelinux/alpine-make-rootfs/issues/10



Co-Authored-By: Conrad Hoffmann <[email protected]>

Since Alpine 3.7.

Resolves #6

Co-Authored-By: Jakub Jirutka <[email protected]>
I just refactored the code.