ci: add full-node tests (#920)

diff --git a/images/netoffload/Earthfile b/images/netoffload/Earthfile
index 557a394..ef68195 100644
--- a/images/netoffload/Earthfile
+++ b/images/netoffload/Earthfile
@@ -1,5 +1,6 @@
 VERSION 0.7
 
+ARG --global REGISTRY=ghcr.io/vexxhost/atmosphere
 ARG --global PROJECT=netoffload
 ARG --global RELEASE=main
 ARG --global PROJECT_REF=94b8c0fdb0b83bd1b7e14b9a58077a047c78a800
@@ -20,8 +21,8 @@
   COPY +build/offloadctl /usr/local/bin/offloadctl
   ENTRYPOINT ["/usr/local/bin/offloadctl"]
   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