Merge pull request #48357 from vvoland/improve-docs #97

Job	Run time
validate-dco / run	21s
build	2m 0s
test (dockerd, client, integration)	19m 8s
test (dockerd, cmd/buildctl, integration)	6m 58s
test (dockerd, solver, integration)	6m 40s
test (dockerd, frontend, integration)	7m 15s
test (dockerd, frontend/dockerfile, integration)	26m 32s
test (dockerd-containerd, client, integration)	36m 28s
test (dockerd-containerd, cmd/buildctl, integration)	6m 49s
test (dockerd-containerd, solver, integration)	6m 56s
test (dockerd-containerd, frontend, integration)	6m 50s
test (dockerd-containerd, frontend/dockerfile, integration)	28m 10s
	2h 34m 7s

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