First draft of ctb docker build workflow #1

	name: docker-build-edge

	on:
	push:
	branches:
	- master

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

	jobs:
	build:

	runs-on: ubuntu-latest

	strategy:
	matrix:
	variant: ['', 'alpine']

	steps:
	-
	name: Checkout repo
	uses: actions/checkout@v3
	-
	name: Log in to the Github Container Registry
	uses: docker/login-action@v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	-
	name: Set up QEMU
	uses: docker/setup-qemu-action@v2
	with:
	platforms: linux/amd64,linux/arm64
	-
	name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	-
	name: Extract metadata (tags, labels) for docker image
	id: meta
	uses: docker/metadata-action@v4
	with:
	images: \|
	${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: \|
	type=edge,branch=master
	labels: \|
	maintainer=Chair of Geoinformatics, Technical University of Munich (TUM)
	org.opencontainers.image.vendor=Chair of Geoinformatics, Technical University of Munich (TUM)
	org.opencontainers.image.title=ctb-quantized-mesh
	-
	name: Build and publish ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	uses: docker/build-push-action@v4
	with:
	push: false
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	platforms: linux/amd64,linux/arm64
	-
	name: Build and publish ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:alpine
	uses: docker/build-push-action@v4
	with:
	push: false
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	platforms: linux/amd64,linux/arm64
	file: Dockerfile.alpine

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