ci: Add job 'build-jar' (with maven) #2

	name: Build & Publish Docker Image to GHCR

	on:
	push:
	branches:
	- main # Change if needed
	workflow_dispatch: # Allow manual trigger

	permissions:
	contents: read
	packages: write # Allows pushing to GHCR

	jobs:
	build-jar:
	name: Build JAR with Maven
	runs-on: ubuntu-latest

	steps:
	- name: Checkout Repository
	uses: actions/checkout@v4

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

	- name: Build with Maven
	run: mvn clean package -DskipTests

	- name: Upload JAR as Artifact
	uses: actions/upload-artifact@v4
	with:
	name: java-artifacts
	path: \|
	target/*.jar
	target/lib/*.jar

	build-and-push:
	name: Build & Push Docker Image
	runs-on: ubuntu-latest
	needs: build-jar

	steps:
	- name: Checkout Repository
	uses: actions/checkout@v4

	- name: Log in to GHCR
	run: echo "${{ secrets.GITHUB_TOKEN }}" \| docker login ghcr.io -u $GITHUB_ACTOR --password-stdin

	- name: Build Docker Image
	run: \|
	docker build -t ghcr.io/${{ github.repository_owner }}/${{ github.repository }}:latest .

	- name: Push Docker Image to GHCR
	run: \|
	docker push ghcr.io/${{ github.repository_owner }}/${{ github.repository }}:latest

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