Use null instead of default, to avoid stomping on netmask #16775

	name: Design preview

	on:
	pull_request:
	types:
	- opened
	- synchronize
	- reopened
	- labeled
	branches:
	- dev

	env:
	NODE_OPTIONS: --max_old_space_size=6144

	jobs:
	preview:
	runs-on: ubuntu-latest
	# Skip running on forks since it won't have access to secrets
	# Skip running PRs without 'needs design preview' label
	if: github.repository == 'home-assistant/frontend' && contains(github.event.pull_request.labels.*.name, 'needs design preview')
	steps:
	- name: Check out files from GitHub
	uses: actions/[email protected]

	- name: Setup Node
	uses: actions/[email protected]
	with:
	node-version-file: ".nvmrc"
	cache: yarn

	- name: Install dependencies
	run: yarn install --immutable

	- name: Build Gallery
	run: ./node_modules/.bin/gulp build-gallery
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Deploy preview to Netlify
	id: deploy
	uses: netlify/actions/cli@master
	with:
	args: deploy --dir=gallery/dist --alias "deploy-preview-${{ github.event.number }}"
	env:
	NETLIFY_AUTH_TOKEN: ${{ secrets.NETLIFY_AUTH_TOKEN }}
	NETLIFY_SITE_ID: ${{ secrets.NETLIFY_GALLERY_SITE_ID }}

	- name: Generate summary
	run: \|
	echo "${{ steps.deploy.outputs.NETLIFY_LIVE_URL \|\| steps.deploy.outputs.NETLIFY_URL }}" >> "$GITHUB_STEP_SUMMARY"

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