Add build step to alarm-server Docker workflow

Author: georgweiss

.github/workflows/alarm-server-docker-image.yml

@@ -12,6 +12,17 @@ env:
   IMAGE_NAME: ${{ github.repository }}/service-alarm-server
 
 jobs:
+  build-server:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Maven and Java Action
+        uses: s4u/[email protected]
+        with:
+          java-version: '17'
+          maven-version: '3.9.6'
+      - name: Build
+        run: mvn --batch-mode install -DskipTests
   build-and-push-image:
     permissions:
       contents: read