Update .gitlab-ci.yml file

.gitlab-ci.yml

-image: node:latest
-
 pages:
-  script:
-    - mkdir .public
-    - cp -r * .public
-    - mv .public main
-    - mv main/index.html .
-  artifacts:
-    paths:
-      - public
-  only:
-    - main
+ stage: deploy
+ script:
+ - mkdir .public
+ - cp -r * .public
+ - mv .public public
+ artifacts:
+ paths:
+ - public
+ only:
+ - main
\ No newline at end of file