Update #168

	name: Build Docker Image
	on:
	push:
	branches: [dev]

	jobs:
	build:
	runs-on: ubuntu-latest
	permissions:
	packages: write
	steps:
	- uses: actions/checkout@v4

	- name: Set up JDK 21
	uses: actions/setup-java@v4
	with:
	java-version: "21"
	distribution: "adopt"

	- name: Validate Gradle wrapper
	uses: gradle/wrapper-validation-action@e6e38bacfdf1a337459f332974bb2327a31aaf4b

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

	- name: Login to GitHub Container Registry
	if: ${{ github.ref == 'refs/heads/dev' }}
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Docker Build-Tag-Push my-app
	run: \|
	./gradlew bootBuildImage
	docker tag gamma:2.0.0-SNAPSHOT ghcr.io/cthit/gamma:latest
	docker push ghcr.io/cthit/gamma:latest
	working-directory: ./app

	- name: Cleanup Gradle Cache

	# Remove some files from the Gradle cache, so they aren't cached by GitHub Actions.
	# Restoring these files from a GitHub Actions cache might cause problems for future builds.
	run: \|
	rm -f ~/.gradle/caches/modules-2/modules-2.lock
	rm -f ~/.gradle/caches/modules-2/gc.properties

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