Return an error if the path is not permanent #232

	name: QUIC Network Simulator

	on:
	schedule:
	- cron: '42 3 * * 2,5' # Runs at 03:42 UTC (m and h chosen arbitrarily) twice a week.
	workflow_dispatch:
	pull_request:
	branches: ["main"]
	paths:
	- 'qns/**'
	- '.github/workflows/qns.yml'
	merge_group:
	branches: ["main"]
	paths:
	- 'qns/**'
	- '.github/workflows/qns.yml'
	jobs:
	docker-image:
	runs-on: ubuntu-latest
	permissions:
	packages: write
	steps:
	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

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

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ github.token }}

	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ghcr.io/${{ github.repository }}-qns
	tags: \|
	# default
	type=schedule
	type=ref,event=branch
	type=ref,event=tag
	type=ref,event=pr
	# set latest tag for default branch
	type=raw,value=latest,enable={{is_default_branch}}

	- name: Build and push
	uses: docker/build-push-action@v5
	with:
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	file: qns/Dockerfile
	build-args: \|
	RUST_VERSION=stable
	cache-from: type=gha
	cache-to: type=gha,mode=max
	platforms: linux/amd64, linux/arm64

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