Revert "try to skip a build step"

This doesn't work: pages runs in parallel with the build stage (!) and
fails to find its artifacts. Go figure.

This reverts commit b9fafbec.

.gitlab-ci.yml

@@ -28,8 +28,12 @@ build:
 # jobs pages config should implement a script: or a trigger: keyword
 pages:
   stage: deploy
+  before_script:
+    - apt update
+    - apt upgrade -yy
+    - apt install -yy hugo
   script:
-    - "true"
+    - hugo
   artifacts:
     paths:
       - public