add ci

.gitlab-ci.yaml

+Build for review:
+    stage: build
+    before_script:
+      - bundle install --path ~/.gem && bundle update
+    script:
+      - 'echo "project_id: $CI_PROJECT_ID" > _config_review.yml'    
+      - 'echo "project_namespace: $CI_PROJECT_PATH" >> _config_review.yml'
+      - 'echo "mr_id: $CI_MERGE_REQUEST_ID" >> _config_review.yml'
+      - 'echo "gitlab_host: https://git-r3lab.uni.lu" >> _config_review.yml'
+      - bundle exec jekyll build -d public --config "_config.yml,_config_review.yml"
+    artifacts:
+      expire_in: 1 month
+      paths:
+        - public
+    variables:
+      JEKYLL_ENV: review
+    only:
+      - branches@$CI_PROJECT_PATH.pages.uni.lu
+    except:
+      - master
+    tags:
+      - review-app
+  
+  Publish review:
+    stage: review
+    script:
+      - rsync -av --delete public /srv/nginx/pages/$CI_PROJECT_NAMESPACE/$CI_BUILD_REF_SLUG
+    environment:
+      name: review $CI_BUILD_REF_NAME for $CI_PROJECT_NAMESPACE
+      url: http://CI_BUILD_REF_SLUG-$CI_PROJECT_NAMESPACE.review.lcsb.uni.lu
+      on_stop: "Un-publish review"
+    only:
+      - branches@$CI_PROJECT_PATH.pages.uni.lu
+    except:
+      - master
+    tags:
+      - review-app
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