build: Add linux/amd64,linux/arm64 builds #52

	name: Docker Image CI

	on:
	push:
	branches: [ master ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	tags:
	- 18-2.6.6
	- 20-2.6.6
	- 20-2.6.8
	- 20-2.6.9
	- 20-2.6.10
	- 20-2.7.4
	- 20-2.7.5
	- 20-2.7.6
	- 20-2.7.7
	- 20-2.7.8
	- 20-3.0.2
	- 20-3.0.3
	- 20-3.1.2
	- 22-3.1.2
	- 22-3.1.4
	- 22-3.2.2
	- 22-3.2.4
	- 24-3.2.2
	- 24-3.2.4
	- 24-3.3.4
	steps:
	# Checkout this repo
	# https://github.com/actions/checkout
	- name: Checkout repo
	uses: actions/checkout@v4

	# Add support for more platforms with QEMU (optional)
	# https://github.com/docker/setup-qemu-action
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

	# Set up Docker Buildx
	# https://github.com/docker/setup-buildx-action
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	# Login against a Docker registry
	# https://github.com/docker/login-action
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: rnters-bot
	password: ${{ secrets.GH_ACTIONS_PAT }}

	# Build and push Docker image with Buildx
	# https://github.com/docker/build-push-action
	- name: Build and push ${{ matrix.ruby }}
	uses: docker/build-push-action@v6
	with:
	context: ${{ matrix.tags }}/.
	no-cache: true
	push: true
	platforms: linux/amd64,linux/arm64
	tags: ghcr.io/flecto-io/heroku-rails:${{ matrix.tags }}

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