Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -39,7 +39,7 @@ docker_build_test:
   script:
     - echo "Building Docker image on host daemon..."
     - docker build --build-arg BUILD_NUMBER="$BUILD_NUMBER" -t "$DOCKER_IMAGE:$DOCKER_TAG" .
-    - docker images | grep "$DOCKER_IMAGE" || (echo "Image not found" && exit 1)
+    - docker images | grep "$D OCKER_IMAGE" || (echo "Image not found" && exit 1)
 
 # docker_build_test:
 #   image: docker:24.0.5