Revert "Update .gitlab-ci.yml"

This reverts commit ff80395e

.gitlab-ci.yml

-# The Docker image that will be used to build your app
-image: alpine:latest
+# This file is a template, and might need editing before it works on your project.
+# Full project: https://gitlab.com/pages/plain-html
+
+image: busybox
+
+pages:
+  stage: deploy
+  script:
+    - echo "The site will be deployed to $CI_PAGES_URL"
+  artifacts:
+    paths:
+      - public
+  rules:
+    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH