added configuration for platform #9

	name: Build Production Image

	on:
	push:
	branches:
	- docker

	env:
	REGISTRY: ghcr.io
	SERVER_IMAGE_NAME: spreehood/spree-backend

	jobs:
	build_and_deploy:
	runs-on: ubuntu-latest
	env:
	APP_NAME: spree-backend
	BASE_DOCKER_IMAGE: ruby:3.2.0
	strategy:
	fail-fast: false
	matrix:
	platform:
	- linux/amd64
	- linux/arm64

	steps:
	- name: Prepare
	run: \|
	platform=${{ matrix.platform }}
	echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV

	- name: Checkout Repository
	uses: actions/checkout@v2

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Log in to the Container registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.SERVER_IMAGE_NAME }}

	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	id: build
	with:
	context: .
	file: ./Dockerfile.production
	platforms: ${{ matrix.platform }}
	push: true
	labels: ${{ steps.meta.outputs.labels }}
	tags: ghcr.io/spreehood/spree-backend:latest, ghcr.io/spreehood/spree-backend:${{github.ref_name}}

	- name: Export digest
	run: \|
	mkdir -p /tmp/digests
	digest="${{ steps.build.outputs.digest }}"
	touch "/tmp/digests/${digest#sha256:}"

	- name: Upload digest
	uses: actions/upload-artifact@v4
	with:
	name: digests-webapp
	path: /tmp/digests/*
	if-no-files-found: error
	retention-days: 1

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