Merged requested to merge dorota.czaplejewicz/librem5-devkit-tools:resize_systemd into master
Just like it says. Using a unit, because resizing online is much easier than doing it right and in initrd.
I'm not sure if I did the copyright file correctly.
This will only work right when the cloud-initramfs-growroot_18-debian7 from sid is installed, but won't cause any harm otherwise.