Publish Docker image #38

	name: Publish Docker image

	on:
	push:
	tags:
	- centraldogma-*

	env:
	LC_ALL: 'en_US.UTF-8'
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	push_to_registry:
	name: Push Docker image to Docker Hub
	if: github.repository == 'line/centraldogma'
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repo
	uses: actions/checkout@v3

	- name: Set up JDK 17
	uses: actions/setup-java@v3
	with:
	distribution: 'temurin'
	java-version: 17

	- name: Setup Gradle
	uses: gradle/gradle-build-action@v2

	- name: Build Docker image
	run: ./gradlew :dist:docker --stacktrace
	shell: bash

	- name: Extract release version
	id: release-version
	uses: actions/github-script@v4
	with:
	# Extract a release version from 'refs/tags/centraldogma-x.y.z' tag.
	script: \|
	const version = context.ref.replace(/.*centraldogma-/, '')
	console.log('Release version: ' + version)
	return version
	result-encoding: string

	- name: Log in to the Container registry
	uses: docker/login-action@v2
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Push Docker image
	run: \|
	docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.release-version.outputs.result }}
	docker push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
	shell: bash

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