fix: doc/doc-requirements.txt to reduce vulnerabilities #284

	# This workflow provides a diff of the rendered Helm chart's templates with the
	# latest released dev version of the chart.
	---
	name: Helm diff

	on:
	pull_request:
	push:
	workflow_dispatch:

	jobs:
	diff-rendered-templates:
	runs-on: ubuntu-20.04
	steps:
	- uses: actions/checkout@v2
	with:
	fetch-depth: 0

	- uses: jupyterhub/action-k3s-helm@v1
	with:
	k3s-channel: v1.19
	metrics-enabled: false
	traefik-enabled: false
	docker-enabled: true

	- uses: actions/setup-python@v2
	with:
	python-version: '3.8'
	- name: Install helm diff plugin, update local chart dependencies
	run: \|
	helm plugin install https://github.com/databus23/helm-diff
	helm dependency update ./helm-chart/binderhub

	- name: "Install latest released dev chart"
	run: \|
	UPGRADE_FROM_VERSION=$(curl -sS https://jupyterhub.github.io/helm-chart/info.json \| jq -er '.binderhub.dev')

	# NOTE: We change the directory so binderhub the chart name won't be
	# misunderstood as the local folder name.
	cd testing

	helm install binderhub-test binderhub \
	--values ./k8s-binder-k8s-hub/binderhub-chart-config.yaml \
	--repo https://jupyterhub.github.io/helm-chart/ \
	--version=$UPGRADE_FROM_VERSION

	- name: "Helm diff latest released dev chart with local chart"
	run: \|
	echo "NOTE: For the helm diff, we have not updated the Chart.yaml"
	echo " version or image tags using chartpress."
	echo

	helm diff upgrade binderhub-test helm-chart/binderhub \
	--values testing/k8s-binder-k8s-hub/binderhub-chart-config.yaml \
	--context=3

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