Recompiling the entire OS for every build takes way too long for
development purposes. Since we build binary packages anyway, let's keep
them around between builds by storing them on a Kubernetes persistent
volume.
Eventually, I want add a build parameter to wipe out the binary package
storage to force a from-scratch build. We'll use that option for robust
periodic builds, once development has slowed down.
I don't know what this is for; I think it has something to do with
containers, possibly for `systemd-npsawn`? It spawns a bunch of
processes and wastes several megabytes of RAM.
Deleting the initial password for `root` so we can log in to the serial
console for debugging.
Enabling _wpa_supplicant_ to connect to WiFi automatically.
We need the Broadcom firmware from the _linux-firmware_ package (and
nothing else). We also need _wpa_supplicant_, to configure the WiFi
connection. Finally, we need to configure _systemd-networkd_ to manage
the network device.
Need to add `rootwait` because the Raspberry Pi SD card reader is really
slow and does not initialize in time for the kernel to load the root
filesystem from it.
Dustin