feat: publish build artifact as docker image

.github/workflows/on-tagged-release.yml

@@ -0,0 +1,37 @@
+name: Publish Docker image for tag
+
+on: workflow_dispatch
+
+jobs:
+  push_to_registry:
+    name: Publish Docker image to nexus terrestris
+    runs-on: ubuntu-24.04
+    if: startsWith(github.ref, 'refs/tags/') # Only run if the release is tagged
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v4
+
+      - name: Set up Java 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 17
+          architecture: x64
+
+      - name: Build with Maven
+        run: mvn clean package
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@f4ef78c080cd8ba55a85445d5b36e214a81df20a
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@3b5e8027fcad23fda98b2e3ac259d8d67585f671
+        with:
+          context: .
+          file: ./Dockerfile
+          push: true
+          tags: ${{ github.ref }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

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+FROM docker.terrestris.de/busybox
+
+ADD target/event-listener-shogun-jar-with-dependencies.jar /