ci: add full-node tests (#920)

diff --git a/images/designate/Earthfile b/images/designate/Earthfile
index d88dc10..21d8973 100644
--- a/images/designate/Earthfile
+++ b/images/designate/Earthfile
@@ -1,5 +1,6 @@
 VERSION 0.7
 
+ARG --global REGISTRY=ghcr.io/vexxhost/atmosphere
 ARG --global PROJECT=designate
 ARG --global RELEASE=2023.2
 ARG --global PROJECT_REF=2c817b3d7f01de44023f195c6e8de8853683a54a
@@ -16,5 +17,5 @@
   DO ../+APT_INSTALL \
     --PACKAGES "bind9utils"
   SAVE IMAGE --push \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${RELEASE} \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${PROJECT_REF}
+    ${REGISTRY}/${PROJECT}:${RELEASE} \
+    ${REGISTRY}/${PROJECT}:${PROJECT_REF}