Add documentation for perl venv #469

	name: ShellCheck
	on:
	push:
	paths-ignore:
	- 'docs/**'
	pull_request:
	jobs:
	shellcheck:
	runs-on: ubuntu-latest
	container:
	image: koalaman/shellcheck-alpine:stable
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 1
	- run: ./shellcheck.sh

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