Only make docker images on master #7

	# SPDX-FileCopyrightText: Stefan Tatschner
	#
	# SPDX-License-Identifier: CC0-1.0

	# https://docs.github.com/en/actions/publishing-packages/publishing-docker-images


	name: Publish debian container

	on:
	push:
	branches:
	- master

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

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	# Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
	permissions:
	contents: read
	packages: write
	attestations: write
	id-token: write

	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3

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

	- name: Build and push Debian container image
	id: push
	uses: docker/build-push-action@v6
	with:
	push: true
	context: containers/debian
	file: containers/debian/Containerfile
	tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:debian
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max

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