fix: convert from long `RUN` statements to a `setup.sh` script #42

	name: Check the Docker image builds for a PR

	on:
	pull_request:

	jobs:
	lint_dockerfile:
	name: Lint Dockerfile
	runs-on: ubuntu-latest
	steps:
	-
	name: Checkout github repository
	uses: actions/checkout@v6
	-
	name: Lint Dockerfile with hadolint
	uses: hadolint/hadolint-action@v3.3.0
	with:
	dockerfile: Dockerfile

	lint_shell_scripts:
	name: Lint shell scripts
	runs-on: ubuntu-latest
	steps:
	-
	name: Checkout github repository
	uses: actions/checkout@v6
	-
	name: Install shell lint tools
	run: \|
	sudo apt-get update
	sudo apt-get install -y shellcheck shfmt
	-
	name: Run shellcheck
	run: \|
	set -euo pipefail
	mapfile -t scripts < <(git ls-files '*.sh')
	shellcheck --severity style "${scripts[@]}"
	-
	name: Run shfmt
	run: \|
	set -euo pipefail
	mapfile -t scripts < <(git ls-files '*.sh')
	shfmt -d -i 4 -ci "${scripts[@]}"

	check_build:
	runs-on: ubuntu-latest
	steps:
	-
	name: Checkout github repository
	uses: actions/checkout@v6
	-
	name: Setup Docker buildx
	uses: docker/setup-buildx-action@v3
	-
	name: Set pull request build arguments
	id: pr_meta
	run: \|
	appGitRef=develop
	appAddSha=true

	echo "appGitRef=$appGitRef" >> "$GITHUB_OUTPUT"
	echo "appAddSha=$appAddSha" >> "$GITHUB_OUTPUT"
	-
	name: Build Docker image
	uses: docker/build-push-action@v6
	with:
	context: .
	platforms: linux/amd64
	build-args: \|
	VERSION_PHP=8.4
	VERSION_COMPOSER=lts
	APP_GH_REF=${{ steps.pr_meta.outputs.appGitRef }}
	APP_GH_ADD_SHA=${{ steps.pr_meta.outputs.appAddSha }}
	load: false
	push: false

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