Run a pre-prod test CI step

.gitlab-ci.yml

@@ -23,5 +23,5 @@ test:
   script:
     - apt -q update
     - env DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends install curl
-    - curl -H "Host: noblogs.org" -v ${SITE_URL}
+    - "curl -H 'Host: noblogs.org' -v ${SITE_URL}"