Update .gitlab-ci.yml file

.gitlab-ci.yml

+image: alpine:latest
+
+stages:
+  - deploy
+
+pages:
+  stage: deploy
+  script:
+    - mkdir -p public
+    - echo "deploy to https://transfer.hft-stuttgart.de/pages/$CI_PROJECT_PATH/" > public/index.html
+  artifacts:
+    paths:
+      - public
+  only: 
+    - master
\ No newline at end of file