metadata: Add help URL #188

	name: Build Docker images for Blue Nebula server

	on:
	push:
	tags:
	- "*"
	branches:
	- "*"
	pull_request:
	branches:
	- master
	workflow_dispatch:
	inputs:
	include_arm64:
	description: Build arm64 Docker image
	type: boolean
	required: false
	default: false

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

	jobs:
	build-and-push:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write

	steps:
	- uses: actions/checkout@v6

	- name: Fetch relevant submodules
	run: \|
	git submodule update --init src/enet
	git submodule update --init data/maps

	- name: Log in to the Container registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: \|
	${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: \|
	type=semver,pattern={{version}},event=tag
	type=ref,event=branch
	type=sha

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v3

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

	- name: Build and push Docker images
	uses: docker/build-push-action@v6
	with:
	context: .
	file: docker/Dockerfile
	# enable arm64 by default once native runners are available
	platforms: ${{ inputs.include_arm64 && 'linux/amd64,linux/arm64' \|\| 'linux/amd64' }}
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}

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