fix

.gitlab-ci.yml

@@ -18,7 +18,7 @@
       docker build
       --file ${DOCKERFILE}
       --pull
-      --build-arg DEBIAN_TAG=${DEBIAN_RELEASE}-slim \
+      --build-arg DEBIAN_TAG=${DEBIAN_RELEASE}-slim
       --build-arg VCS_REF=$CI_COMMIT_SHA
       --build-arg VCS_URL=$CI_PROJECT_URL
       --cache-from "${TAG_LATEST}"