Update .gitlab-ci.yml file

.gitlab-ci.yml

 # The Docker image that will be used to build your app
 image: alpine:latest
+
+pages:
+  script:
+    - mkdir -p public  # Ensure the public folder exists
+    - cp index.html public/  # Move your HTML file into the public folder
+  artifacts:
+    paths:
+      - public  # GitLab Pages serves files from 'public'
+  only:
+    - main  # Runs this job only on the main branch
\ No newline at end of file