Use --build-only for conda build in conda action to speed up test #44

	name: Docker

	on:
	push:
	branches:
	- master
	pull_request:
	paths:
	- 'docker/Dockerfile'
	- '.github/workflows/docker.yml'
	release:
	types:
	- released
	# allow manually starting this workflow
	workflow_dispatch:

	jobs:
	ci:
	name: ${{ matrix.distro }}
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false
	matrix:
	distro: [focal, jammy, noble]
	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}
	PUSH_DOCKER_IMAGE: ${{ github.ref == 'refs/heads/master' \|\| github.event_name == 'release' }}
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

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

	- name: Extract Docker meta-information
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	flavor: \|
	latest=false
	prefix=
	suffix=
	tags: \|
	type=ref,event=branch,prefix=${{ matrix.distro }}-
	type=raw,event=pr,prefix=${{ matrix.distro }}-,value=master
	type=semver,pattern={{major}}.{{minor}},prefix=${{ matrix.distro }}-

	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	file: docker/Dockerfile
	build-args: TAG=${{ steps.meta.outputs.version }}
	push: ${{ env.PUSH_DOCKER_IMAGE }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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