Merge pull request #20: Fixes to the `README.md`: restore notice boxes #28

Job	Run time
compile	54s
plugin-check	18s
Build board with vagrant	5m 5s
Build beaglebone-black/angstrom.json image	58s
Build beaglebone-black/archlinuxarm.json image	1m 4s
Build beaglebone-black/debian.json image	1m 7s
Build beaglebone-black/ubuntu.pkr.hcl image	1m 10s
Build odroid-u3/archlinuxarm.json image	1m 34s
Build odroid-xu4/archlinuxarm.json image	53s
Build odroid-xu4/ubuntu.json image	2m 37s
Build parallella/archlinuxarm.json image	1m 51s
Build parallella/ubuntu.json image	1m 2s
Build raspberry-pi/archlinuxarm.json image	1m 21s
Build raspberry-pi/raspbian.json image	1m 18s
Build raspberry-pi/raspbian-resize.json image	1m 45s
Build raspberry-pi/raspios-lite-arm.json image	47s
Build raspberry-pi-3/archlinuxarm.json image	54s
Build raspberry-pi-3/raspios-lite-arm64.json image	1m 5s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.json image	8m 0s
Build raspberry-pi-4/ubuntu_server_20.04_arm64.pkr.hcl image	1m 26s
Build raspberry-pi-4/archlinuxarm.pkr.hcl image	1m 7s
Build rock-4b/debos-radxa.pkr.hcl image	1m 18s
Build wandboard/archlinuxarm.json image	1m 17s
	38m 51s

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