docker: Install archlinux-keyring from source #573

Job	Run time
test (debos-arch)	1m 7s
Check DockerHub secrets exist	1s
test (debos-bookworm)	50s
test (debos-bullseye)	51s
test (debos-trixie)	1m 4s
Build Docker container	5m 23s
Run unit tests	2m 7s
recipes on nofakemachine	52s
escaping on nofakemachine	53s
debian (amd64) on nofakemachine	1m 26s
debian (arm64) on nofakemachine	2m 23s
debian (armhf) on nofakemachine	2m 19s
recipes on qemu	56s
escaping on qemu	55s
debian (amd64) on qemu	5m 20s
debian (arm64) on qemu	32m 49s
debian (armhf) on qemu	35m 25s
recipes on uml	53s
escaping on uml	55s
debian (amd64) on uml	5m 7s
debian (arm64) on uml	9m 57s
debian (armhf) on uml	17m 52s
arch on arch	9m 12s
partitioning on qemu	58s
apertis on uml	7m 14s
partitioning on uml	1m 7s
allgreen	7s
Publish to DockerHub	2m 42s
Publish to GHCR	2m 29s
	2h 33m 14s

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