ENH: add automated Docker image builds #6

	name: CI
	on:
	pull_request:
	branches: ["main"]
	push:
	branches: ["main"]

	jobs:
	ci:
	uses: qiime2/distributions/.github/workflows/lib-ci-dev.yaml@dev
	with:
	distro: shotgun
	additional-reports-path: ./coverage.xml
	additional-reports-name: coverage

	coverage:
	needs: [ci]
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4

	- uses: actions/download-artifact@v3
	name: 'Fetch coverage from builds'
	with:
	name: ${{ needs.ci.outputs.additional-reports-name }}
	path: ${{ needs.ci.outputs.additional-reports-path }}

	- uses: codecov/codecov-action@v3
	name: 'Upload coverage'
	with:
	fail_ci_if_error: true

	build-docker-image:
	# needs: [coverage]
	runs-on: ubuntu-latest
	steps:
	- name: Prepare tags
	id: prep
	run: \|
	DOCKER_IMAGE="${{ secrets.DOCKER_REPO }}"
	TAGS="${DOCKER_IMAGE}:${GITHUB_SHA::8}"
	echo ::set-output name=tags::${TAGS}
	echo ::set-output name=created::$(date -u +'%Y-%m-%dT%H:%M:%SZ')

	- name: Print the latest tag
	run: echo ${{ github.ref_name }}

	- name: Set up QEMU
	uses: docker/setup-qemu-action@master
	with:
	platforms: all

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

	- name: Login to Quay Registry
	if: github.event_name != 'pull_request'
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	- name: Build and push Docker images
	uses: docker/build-push-action@v2
	with:
	context: .
	file: ./Dockerfile
	platforms: linux/amd64,linux/arm/v6
	push: ${{ github.event.pull_request.merged }}
	tags: ${{ steps.prep.outputs.tags }}

Provide feedback