Add alias for Gentoo #6

	---
	name: Check aliases

	on:
	push:
	branches:
	- "main"
	pull_request:

	jobs:
	check-inspect:
	name: use skopeo to check whether all images in shortnames.conf are reachable
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v3
	- uses: actions/setup-python@v4
	with:
	python-version: '3.x'

	- run: \|
	sudo mkdir -p /etc/apt/keyrings
	curl -fsSL https://download.opensuse.org/repositories/devel:kubic:libcontainers:unstable/xUbuntu_$(lsb_release -rs)/Release.key \
	\| gpg --dearmor \
	\| sudo tee /etc/apt/keyrings/devel_kubic_libcontainers_unstable.gpg > /dev/null
	echo \
	"deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/devel_kubic_libcontainers_unstable.gpg]\
	https://download.opensuse.org/repositories/devel:kubic:libcontainers:unstable/xUbuntu_$(lsb_release -rs)/ /" \
	\| sudo tee /etc/apt/sources.list.d/devel:kubic:libcontainers:unstable.list > /dev/null
	sudo apt-get update -qq
	sudo apt-get -qq -y install skopeo

	- name: install poetry & dependencies
	run: pip install poetry && poetry install

	- name: try to inspect all container images
	run: \|
	poetry run ./inspect-images.py

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