add feedback button in footer #118

	name: Cleanup GitHub pages

	on:
	pull_request_target:
	types: [closed]

	jobs:
	cleanup-pages:
	name: Delete demo page when PR closed
	runs-on: ubuntu-latest
	steps:
	- name: Checkout 🛎️
	uses: actions/checkout@v3
	with:
	ref: 'gh-pages'

	- name: Delete files
	shell: bash
	run: \|
	git config --global user.email "[email protected]"
	git config --global user.name "Yi Lei Feng"
	git rm -r ${{ github.head_ref }}/*
	git commit -a -m 'Delete PR demo from GH pages ${{ github.head_ref }}'
	git push origin HEAD:gh-pages

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