[Fixes #2] Publish container to ghcr.io #10

Job	Run time
compile	51s
Build board with vagrant	1m 31s
plugin-check	15s
Build beaglebone-black/angstrom.json image	44s
Build beaglebone-black/archlinuxarm.json image	1m 4s
Build beaglebone-black/debian.json image	1m 2s
Build beaglebone-black/ubuntu.pkr.hcl image	1m 18s
Build odroid-u3/archlinuxarm.json image	1m 16s
Build odroid-xu4/archlinuxarm.json image	2m 2s
Build odroid-xu4/ubuntu.json image	1m 45s
Build parallella/archlinuxarm.json image	2m 3s
Build parallella/ubuntu.json image	51s
Build raspberry-pi/archlinuxarm.json image	1m 0s
Build raspberry-pi/raspbian.json image	1m 17s
Build raspberry-pi/raspbian-resize.json image	1m 22s
Build raspberry-pi/raspios-lite-arm.json image	1m 6s
Build raspberry-pi-3/archlinuxarm.json image	1m 10s
Build raspberry-pi-3/raspios-lite-arm64.json image	46s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.json image	2m 45s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.pkr.hcl image	2m 49s
Build raspberry-pi-4/archlinuxarm.pkr.hcl image	1m 9s
Build rock-4b/debos-radxa.pkr.hcl image	1m 29s
Build wandboard/archlinuxarm.json image	1m 15s
	30m 50s

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