docs: add buildx du verbose example #417

	# this workflow runs the remote validate bake target from docker/docker.github.io
	# to check if yaml reference docs and markdown files used in this repo are still valid
	# https://github.com/docker/docker.github.io/blob/98c7c9535063ae4cd2cd0a31478a21d16d2f07a3/docker-bake.hcl#L34-L36
	name: docs-upstream

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	on:
	push:
	branches:
	- 'master'
	- 'v[0-9]*'
	paths:
	- '.github/workflows/docs-upstream.yml'
	- 'docs/**'
	pull_request:
	paths:
	- '.github/workflows/docs-upstream.yml'
	- 'docs/**'

	jobs:
	docs-yaml:
	runs-on: ubuntu-22.04
	steps:
	-
	name: Checkout
	uses: actions/checkout@v4
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	with:
	version: latest
	-
	name: Build reference YAML docs
	uses: docker/bake-action@v4
	with:
	targets: update-docs
	set: \|
	*.output=/tmp/buildx-docs
	*.cache-from=type=gha,scope=docs-yaml
	*.cache-to=type=gha,scope=docs-yaml,mode=max
	env:
	DOCS_FORMATS: yaml
	-
	name: Upload reference YAML docs
	uses: actions/upload-artifact@v3
	with:
	name: docs-yaml
	path: /tmp/buildx-docs/out/reference
	retention-days: 1

	validate:
	uses: docker/docs/.github/workflows/validate-upstream.yml@main
	needs:
	- docs-yaml
	with:
	module-name: docker/buildx
	data-files-id: docs-yaml
	data-files-folder: buildx
	data-files-placeholder-folder: engine/reference/commandline

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