ci: add full-node tests (#920)

diff --git a/images/neutron/Earthfile b/images/neutron/Earthfile
index a9b4712..d4b1bff 100644
--- a/images/neutron/Earthfile
+++ b/images/neutron/Earthfile
@@ -1,5 +1,6 @@
 VERSION 0.7
 
+ARG --global REGISTRY=ghcr.io/vexxhost/atmosphere
 ARG --global PROJECT=neutron
 ARG --global RELEASE=zed
 ARG --global PROJECT_REF=222c997022392561c2de2cb493f0f5214eb20dfc
@@ -17,8 +18,8 @@
   DO ../+APT_INSTALL \
     --PACKAGES "conntrack dnsmasq dnsmasq-utils ebtables ethtool haproxy iproute2 ipset iptables iputils-arping jq keepalived lshw openvswitch-switch strongswan uuid-runtime"
   SAVE IMAGE --push \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${RELEASE} \
-    ghcr.io/vexxhost/atmosphere/${PROJECT}:${PROJECT_REF}
+    ${REGISTRY}/${PROJECT}:${RELEASE} \
+    ${REGISTRY}/${PROJECT}:${PROJECT_REF}
 
 image:
   BUILD --platform linux/amd64 --platform linux/arm64 +platform-image