do not log healthcheck #210

Job	Run time
lint-test	21s
build-push-base / build-push-ar	44s
Find docker images needing built	2s
build-push (examples/curl/Dockerfile) / build-push-ar	21s
build-push (examples/ffmpeg/Dockerfile) / build-push-ar	29s
build-push (examples/cache-warmer/Dockerfile) / build-push-ar	31s
build-push (examples/fits/Dockerfile) / build-push-ar	25s
build-push (examples/imagemagick/Dockerfile) / build-push-ar	44s
build-push (examples/libreoffice/Dockerfile) / build-push-ar	1m 6s
build-push (examples/pandoc/Dockerfile) / build-push-ar	32s
build-push (examples/parry/Dockerfile) / build-push-ar	28s
build-push (examples/tesseract/Dockerfile) / build-push-ar	37s
build-push (examples/whisper/Dockerfile) / build-push-ar	1m 30s
build-push-dependencies (examples/coverpage/Dockerfile) / build-push-ar	42s
Integration tests	56s
	9m 28s

Provide feedback