attempt to switch to ruby as deployment

.gitlab-ci.yml

@@ -56,7 +56,7 @@ preview:
     DEPLOY_URL: https://$CI_PROJECT_NAMESPACE.$CI_PAGES_DOMAIN/-/$CI_PROJECT_NAME/-/jobs/$CI_JOB_ID/artifacts/public
   environment:
     name: review/$CI_COMMIT_REF_NAME
-    url: $DEPLOY_URL/index.html
+    url: $DEPLOY_URL/main.yaml
   rules:
     - if: $CI_COMMIT_BRANCH != $CI_DEFAULT_BRANCH