document gitlab SNAFU

.gitlab-ci.yml

@@ -26,6 +26,10 @@ build:
 # we'd like to *not* rebuild hugo here, but pages fails with:
 #
 # jobs pages config should implement a script: or a trigger: keyword
+#
+# and even if we *do* put a dummy script (say "true"), this fails
+# because it runs in parallel with the build stage, and therefore
+# doesn't inherit artifacts the way a deploy stage normally would.
 pages:
   stage: deploy
   before_script: