docs: add early access dev container docs #3518

	name: weekly-docs
	# runs every monday at 9 am
	on:
	schedule:
	- cron: "0 9 * * 1"
	workflow_dispatch: # allows to run manually for testing
	pull_request:
	branches:
	- main
	paths:
	- "docs/**"

	permissions:
	contents: read

	jobs:
	check-docs:
	# later versions of Ubuntu have disabled unprivileged user namespaces, which are required by the action
	runs-on: ubuntu-22.04
	permissions:
	pull-requests: write # required to post PR review comments by the action
	steps:
	- name: Harden Runner
	uses: step-security/harden-runner@0634a2670c59f64b4a01f0f96f84700a4088b9f0 # v2.12.0
	with:
	egress-policy: audit

	- name: Checkout
	uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

	- name: Check Markdown links
	uses: umbrelladocs/action-linkspector@a0567ce1c7c13de4a2358587492ed43cab5d0102 # v1.3.4
	id: markdown-link-check
	# checks all markdown files from /docs including all subfolders
	with:
	reporter: github-pr-review
	config_file: ".github/.linkspector.yml"
	fail_on_error: "true"
	filter_mode: "nofilter"

	- name: Send Slack notification
	if: failure() && github.event_name == 'schedule'
	run: \|
	curl -X POST -H 'Content-type: application/json' -d '{"msg":"Broken links found in the documentation. Please check the logs at ${{ env.LOGS_URL }}"}' ${{ secrets.DOCS_LINK_SLACK_WEBHOOK }}
	echo "Sent Slack notification"
	env:
	LOGS_URL: https://github.com/coder/coder/actions/runs/${{ github.run_id }}

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