CI/CD: publish docker image in GHCR #16

	# Workflow to check whether changes to master concerning the Dockerfile fulfill all requirements.
	name: Status checks (Dockerfile)

	on:
	# Delivery pipeline already runs this on push to master.
	pull_request:
	paths:
	- Dockerfile

	# Building the Dockerfile includes downloading the IRMA schemes.
	# Therefore, we only run one check at the time, and we put a limit on the event types triggering this job.
	concurrency:
	group: dockerfile

	jobs:
	docker-build:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v3

	- name: Build Dockerfile
	run: docker build -t ghcr.io/${{ github.repository_owner }}/irma:${{ github.sha }} .

	- name: Test Docker image
	run: docker run ghcr.io/${{ github.repository_owner }}/irma:${{ github.sha }} version

Provide feedback