Update .gitlab-ci.yml

.gitlab-ci.yml

-# This file is a template, and might need editing before it works on your project.
-# Full project: https://gitlab.com/pages/plain-html
+image: alpine:latest
+
 pages:
   stage: deploy
   script:
-    - mkdir .public
-    - cp -r * .public
-    - mv .public public
+  - echo "Deploying to https://transfer.hft-stuttgart.de/pages/$CI_PROJECT_PATH/"
   artifacts:
     paths:
-      - public
-  rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
+    - public
+  only:
+  - master