Create docker-publish.yml #4

	name: Publish master image

	on:
	push:
	branches:
	- master
	schedule:
	# Every Sunday, create a new version, to make sure we use an up-to-date base image
	- cron: '0 0 * * 0'

	jobs:
	publish_image:
	name: Publish master image
	runs-on: ubuntu-latest
	permissions:
	packages: write
	contents: read
	steps:
	- uses: actions/checkout@v4

	- name: Set lowercase repository name
	run: echo "GITHUB_REPOSITORY_LC=$(echo ${GITHUB_REPOSITORY} \| tr [A-Z] [a-z])" >> $GITHUB_ENV

	- name: Build Docker image
	run: \|
	docker build -t docker.pkg.github.com/${GITHUB_REPOSITORY_LC}/master:latest .

	- name: Log in to GitHub Docker registry
	run: echo "${GITHUB_TOKEN}" \| docker login docker.pkg.github.com -u "${{ github.actor }}" --password-stdin
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Push Docker image
	run: \|
	docker push docker.pkg.github.com/${GITHUB_REPOSITORY_LC}/master:latest
	env:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

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