Hedgehog Linux SD card image for Raspberry Pi

[mmguero]

From GitHub user @furrnace via cisagov/Malcolm#277

Still I am wondering if the RPi 4b is sufficiently powerful to run reasonable run Hedgehog Linux tools and if there will be an SD card image. This would make deployment in the field for small networks (or home labs) so much more convenient.

This is an interesting idea and one that would provide some value to the project I'm sure. The main issues would be around making sure everything compiles and runs on arm64 and whether or not the Debian live-build installer can generate Pi-compatible images. Cool idea, and something I think we should look into.

[mmguero]

Working the issues out on this now, I'll put some here as I find them:

• right now there's a default username/password; for now this is probably okay but is there another way to handle it?
• ~image doesn't auto-expand to fill the filesystem like stock raspberry pi installations do nowadays~ (fixed with cisagov/Malcolm@9cf174934a0d970cc31b3b6808fdab062c016cd2)
• ~need to pin or apt-hold or something the htpdate package so that an apt upgrade doesn't overwrite it~
• ~this problem with the Zeek debs will be fixed in the next zeek release (see zeek/zeek#3565)~
• ~not ending up with the GeoLite mmdb files in /opt/sensor/sensor_ctl/arkime/~
• ~missing /opt/sensor/sensor_ctl/suricata/rules-default~
• ~some services are being disabled in 0990-remove-unwanted-pkg.hook.chroot but still seem to e running (e.g, clamav-daemon)~
• ~/etc/environment doesn't seem to be set like it is on a regular hedgehog install (see 0910-sensor-build.hook.chroot)~

It's looking good, though.

[mmguero]

Things are working well here from what I can see. Still testing but I'm feeling pretty good about this.