docker: smaller docker image #13

	name: Create and publish a Docker image

	on:
	push:
	branches: ['main', 'staging']
	tags: ['v*']

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

	- name: Cache Docker layers
	uses: actions/cache@v4
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-buildx-
	- name: Log in to the Container registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Get tags
	id: tags
	env:
	IMAGE_NAME: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	run: \|
	echo "value<<EOF" >> $GITHUB_OUTPUT
	./.github/scripts/get-docker-tags.sh "$(date -u +%F)" >> $GITHUB_OUTPUT
	echo "EOF" >> $GITHUB_OUTPUT
	shell: bash
	- name: Build Docker image and publish to Docker Hub
	uses: docker/build-push-action@v5
	with:
	platforms: linux/amd64,linux/arm/v7,linux/arm64/v8
	context: .
	push: true
	file: ./Dockerfile
	tags: "${{ steps.tags.outputs.value }}"
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,dest=/tmp/.buildx-cache-new

	# https://github.com/docker/build-push-action/issues/252
	# https://github.com/moby/buildkit/issues/1896
	- name: Move cache to limit growth
	run: \|
	rm -rf /tmp/.buildx-cache
	mv /tmp/.buildx-cache-new /tmp/.buildx-cache

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