Update .gitlab-ci.yml

.gitlab-ci.yml

+# The Docker image that will be used to build your app
 image: ruby:2.7
-
+# Functions that should be executed before the build script is run
+before_script: []
 pages:
   script:
     - gem install bundler
@@ -7,7 +9,9 @@ pages:
     - bundle exec jekyll build -d public
   artifacts:
     paths:
+      # The folder that contains the files to be exposed at the Page URL
       - public
   rules:
-    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
-  environment: production
\ No newline at end of file
+    # This ensures that only pushes to the default branch will trigger
+    # a pages deploy
+    - if: $CI_COMMIT_REF_NAME == $CI_DEFAULT_BRANCH