Add Gitlab Pages

.gitlab-ci.yml

+image: ruby:2.6
+
+variables:
+  JEKYLL_ENV: production
+  LC_ALL: C.UTF-8
+
+before_script:
+  - bundle install
+
+test:
+  stage: test
+  script:
+  - bundle exec jekyll build -d test
+  artifacts:
+    paths:
+    - test
+  except:
+  - master
+
+pages:
+  stage: deploy
+  script:
+  - bundle exec jekyll build -d public
+  artifacts:
+    paths:
+    - public
+  only:
+  - master
+

Gemfile

+source "https://rubygems.org"
+ruby RUBY_VERSION
+
+# This will help ensure the proper Jekyll version is running.
+gem "jekyll", "3.8.5"
+
+# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
+gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+