fix stages

.gitlab-ci.yml

+stages:
+  - build-package
+  - build-container
+
 build-deb-packages:
     image: maven:3-eclipse-temurin-17-focal
-    stage: build
+    stage: build-package
     script:
         - mvn antrun:run
         - mvn package
@@ -14,7 +18,7 @@ build-docker:
   # Use the official docker image.
   image: gitlab.jonasled.de/jonasled/buildx-docker:latest
   retry: 2
-  stage: build
+  stage: build-container
   services:
     - docker:dind
   before_script: