add yml

.gitlab-ci.yml

-# This file is a template, and might need editing before it works on your project.
-# To contribute improvements to CI/CD templates, please follow the Development guide at:
-# https://docs.gitlab.com/ee/development/cicd/templates.html
-# This specific template is located at:
-# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Pages/HTML.gitlab-ci.yml
+image: ruby:2.7
 
-# Full project: https://gitlab.com/pages/plain-html
 pages:
-  stage: deploy
   script:
-    - mkdir .public
-    - cp -r ./* .public
-    - rm -rf public
-    - mv .public public
+    - gem install bundler
+    - bundle install
+    - bundle exec jekyll build -d public
   artifacts:
     paths:
       - public
-  rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH