Create and publish a Docker image #1

	# https://docs.github.com/ja/actions/publishing-packages/publishing-docker-images
	# https://docs.docker.com/build/ci/github-actions/multi-platform/
	name: Create and publish a Docker image

	on:
	workflow_dispatch:

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: route06/ruby:3.3.0-jammy

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
	- name: Set up QEMU
	uses: docker/setup-qemu-action@68827325e0b33c7199eb31dd4e31fbe9023e06e3 # v3.0.0
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@f95db51fddba0c2d1ec667646a06c2ce06100226 # v3.0.0
	- name: Log in to the Container registry
	uses: docker/login-action@343f7c4344506bcbf9b4de18042ae17996df046d # v3.0.0
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: mkdir -p tmp/ruby
	run: \|
	mkdir -p tmp/ruby
	- name: Build and push
	uses: docker/build-push-action@4a13e500e55cf31b7a5d59a38ab2040ab0f42f56 # v5.1.0
	with:
	build-args: \|
	BASE_IMAGE_TAG=jammy
	RUBY_VERSION=3.3.0
	context: .
	platforms: linux/arm64
	push: true
	tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	target: ruby

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