enable quarto build in gitlab CI

.gitlab-ci.yml

-# This file is a template, and might need editing before it works on your project.
-# Full project: https://gitlab.com/pages/plain-html
-
 pages:
   stage: deploy
-  image: carinerey/r_for_beginners
+  image: rocker/tidyverse
   script:
-    - mkdir -p public/
-    - cp -R img public/
-    - make
+    - quarto -v
+    - |
+      quarto render
+      mkdir public
+      cp -r _book/* public/
+  interruptible: true
   artifacts:
     paths:
       - public