Revert "try out volumes"

This reverts commit 25378e71.

.gitlab-ci.yml

@@ -109,14 +109,13 @@ check:links:
    image:
      name: $CI_REGISTRY/r3/apps/tailorbird/linkchecker
      entrypoint: ["/bin/bash"]
-   volumes:
-     - ./build:/checkFolder
    rules:
      - if: $CI_COMMIT_REF_NAME
      - if: $CI_MERGE_REQUEST_ID
    allow_failure: true
    before_script:
      - cp .ci/jsonWhitelist.txt build/.
+     - cp -r build checkFolder
    script:
      - python link_check.py