Add heroku/heroku:24 and heroku/heroku:24-build as multiarch images #135

	name: CI

	on:
	push:
	# Avoid duplicate builds on PRs.
	branches:
	- main
	tags:
	- v*
	pull_request:

	permissions:
	contents: read

	jobs:
	shellcheck:
	runs-on: ubuntu-22.04
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Run shellcheck
	run: find . -type f $ -name ".sh" -o -path "/bin/" $ ! -name '.jq' \| xargs -t shellcheck
	build-stack:
	runs-on: ubuntu-22.04
	needs:
	- shellcheck
	env:
	STACK: heroku-${{ matrix.stack-version }}
	STACK_VERSION: "${{ matrix.stack-version }}"
	DOCKER_HUB_TOKEN: "${{ secrets.DOCKER_HUB_TOKEN }}"
	DOCKER_HUB_USERNAME: "${{ secrets.DOCKER_HUB_USERNAME }}"
	MANIFEST_APP_TOKEN: "${{ secrets.MANIFEST_APP_TOKEN }}"
	MANIFEST_APP_URL: "${{ secrets.MANIFEST_APP_URL }}"
	strategy:
	fail-fast: false
	matrix:
	stack-version: ["20", "22", "24"]
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	- name: Build images
	run: bin/build.sh $STACK_VERSION
	- name: Check that the generated files are in sync
	run: \|-
	status="$(git status --porcelain)"
	if [[ -n "$status" ]]; then
	echo "Generated files differ from checked-in versions! Run bin/build.sh to regenerate them locally."
	echo -e "\nChanged files:\n${status}\n"
	git diff
	exit 1
	fi
	- name: Publish to image registries
	run: \|-
	docker buildx create --use
	bin/publish-to-registries.sh
	if: success() && (github.ref_name == 'main' \|\| github.ref_type == 'tag')
	- name: Unpublish temp tags from this run
	run: bin/unpublish-temp-tags.sh
	if: always()
	- name: Convert docker image and release to Heroku staging
	run: bin/convert-and-publish-to-heroku.sh
	if: success() && github.ref_type == 'tag'

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