modified github workflow of catlog-service

Author: SureshKumar-HelloWorld

.github/workflows/catlog-service.yml

@@ -33,3 +33,16 @@ jobs:
 
       - name: Build with Maven
         run: ./mvnw -ntp verify
+
+      - if: ${{ github.ref == 'refs/heads/main' }}
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+            username: ${{ vars.DOCKERHUB_USERNAME }}
+            password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - if: ${{ github.ref == 'refs/heads/main' }}
+      - name: Build and Publish Docker Image
+        run : |
+            ./mvnw spring-boot:build-image -DskipTests
+            docker push ${{ secrets.DOCKER_USERNAME }}/bookstore-catlog-service