run tests when building the dockerhub image

.gitea/workflows/docker-image.yml

@@ -20,8 +20,18 @@ jobs:
       # Checkout the repo
       - name: Checkout
         uses: actions/checkout@v4
+
+      # Setup Java and Maven
+      - name: Set up JDK and Maven
+        uses: s4u/setup-maven-action@v1.12.0
         with:
-          fetch-depth: 0
+          java-version: ${{ matrix.java-version }}
+          distribution: "zulu"
+          maven-version: ${{ matrix.maven-version }}
+
+      # Run JUnit Tests
+      - name: Run Tests
+        run: mvn --batch-mode test -q
 
       # Login to Docker Hub
       - name: Login to Repo