Update .gitlab-ci.yml file

.gitlab-ci.yml

@@ -14,10 +14,10 @@ pages:
     - hexo generate
   artifacts:
     paths:
-      - public
+      - frontend/public
   cache:
     paths:
-      - node_modules
+      - frontend/node_modules
     key: project
   rules:
     - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH