ci: add full-node tests (#920)

diff --git a/images/manila/Earthfile b/images/manila/Earthfile
index 5718142..cd5dd98 100644
--- a/images/manila/Earthfile
+++ b/images/manila/Earthfile
@@ -1,5 +1,6 @@
 VERSION 0.7
 
+ARG --global REGISTRY=ghcr.io/vexxhost/atmosphere
 ARG --global PROJECT=manila
 ARG --global RELEASE=2023.2
 ARG --global PROJECT_REF=98bc755673fe48a9c67203e4262315b048efe25d
@@ -16,5 +17,5 @@
   DO ../+APT_INSTALL \
     --PACKAGES "iproute2 openvswitch-switch"
   SAVE IMAGE --push \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${RELEASE} \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${PROJECT_REF}
+    ${REGISTRY}/${PROJECT}:${RELEASE} \
+    ${REGISTRY}/${PROJECT}:${PROJECT_REF}