Use GitLab pages.

.gitlab-ci.yml

+pages:
+  stage: deploy
+  script:
+    - echo assuming pages are built in public
+    - apt-get update -qq; apt-get install  --no-install-recommends -y pandoc
+    - pandoc -o public/index.html README.md
+  artifacts:
+    paths:
+      - public
+  only:
+    - master