Change deploy tag for new host.

.gitlab-ci.yml

@@ -28,7 +28,7 @@ deploy:
   only:
     - master
   tags:
-    - docs-test
+    - hcc-docs-prod
   script:
     - curl -L https://raw.githubusercontent.com/unlhcc/singularity-dockerfiles/master/IMAGELIST.md > static/markdown/singularity-images.md
     - hugo --ignoreCache -b ${BASE_URL} -v