docker: Install archlinux-keyring from source #572

Job	Run time
Check DockerHub secrets exist	1s
test (debos-arch)	1m 9s
test (debos-bookworm)	50s
test (debos-bullseye)	49s
test (debos-trixie)	1m 7s
Build Docker container	5m 57s
Run unit tests	2m 33s
recipes on nofakemachine	46s
escaping on nofakemachine	54s
debian (amd64) on nofakemachine	1m 43s
debian (arm64) on nofakemachine	2m 34s
debian (armhf) on nofakemachine	2m 24s
recipes on qemu	58s
escaping on qemu	1m 7s
debian (amd64) on qemu	5m 13s
debian (arm64) on qemu	32m 31s
debian (armhf) on qemu	33m 56s
recipes on uml	1m 2s
escaping on uml	53s
debian (amd64) on uml	4m 58s
debian (arm64) on uml	10m 25s
debian (armhf) on uml	18m 20s
arch on arch	8m 10s
partitioning on qemu	1m 3s
apertis on uml	7m 36s
partitioning on uml	56s
allgreen	3s
Publish to GHCR	0s
Publish to DockerHub	0s
	2h 27m 58s

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