ci: add a workflow to publish the Docker container #1

	name: docker-publish-ghcr

	on:
	workflow_dispatch:
	push:
	pull_request:

	permissions:
	packages: write

	env:
	PLATFORMS: linux/amd64,linux/arm64

	jobs:
	docker_build_and_publish:
	runs-on: ubuntu-22.04
	steps:
	- name: "Checkout frontend"
	uses: actions/checkout@v4
	with:
	path: frontend
	fetch-depth: 0
	fetch-tags: 1

	- name: "Set up QEMU"
	# Add support for more platforms with QEMU (optional)
	# https://github.com/docker/setup-qemu-action
	uses: docker/setup-qemu-action@v3

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

	- name: "Login to GitHub Container Registry (ghcr.io)"
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{github.actor}}
	password: ${{secrets.GITHUB_TOKEN}}

	- name: "Build and push to ghcr"
	run: \|
	cd backend

	echo "Fix mess with tags in actions/checkout..."
	git fetch -f && git fetch -f --tags

	export TAG=$(git describe HEAD \| sed 's/-.*$//g' \| tr -d "v")
	EXACT_TAG=$(git describe --exact-match --match "v*" \|\| echo "")

	if [[ "${EXACT_TAG}" != "" ]]; then
	echo "Cross-building and PUSHING!"
	docker buildx build --platform ${PLATFORMS} --push -f Dockerfile . --tag ghcr.io/${GITHUB_REPOSITORY}:${TAG}
	else
	echo "Cross-building ONLY"
	docker buildx build --platform ${PLATFORMS} -f Dockerfile .
	fi

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