add GitLab CI manifest

.gitlab-ci.yml

@@ -0,0 +1,31 @@
+# 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/Hugo.gitlab-ci.yml
+
+---
+# All available Hugo versions are listed here:
+# https://gitlab.com/pages/hugo/container_registry
+variables:
+  GIT_SUBMODULE_STRATEGY: recursive
+  HUGO_ENV: production
+
+default:
+  image: "${CI_TEMPLATE_REGISTRY_HOST}/pages/hugo/hugo_extended:latest"
+
+test:
+  script:
+    - hugo --minify
+  rules:
+    - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH
+
+pages:
+  script:
+    - hugo --minify
+  artifacts:
+    paths:
+      - public
+  rules:
+    - if: $CI_COMMIT_BRANCH == "pages"
+  environment: live