Use argument for ssh test

Shilohimage

@@ -102,12 +102,11 @@ USER frappe
 RUN mkdir -p /home/frappe/.ssh
 RUN echo -e "Host *\n\tStrictHostKeyChecking no\n\tIdentityFile /run/secrets/user_ssh_key\n" >> /home/frappe/.ssh/config
 
-RUN ssh -T 'git@githaven.org:2222/Shiloh/brotherton-erpnext.git'
-
 ARG FRAPPE_BRANCH=version-15
 ARG FRAPPE_PATH=https://github.com/frappe/frappe
 ARG ERPNEXT_REPO=ssh://git@githaven.org:2222/Shiloh/brotherton-erpnext.git
 ARG ERPNEXT_BRANCH=production
+RUN ssh -T ${ERPNEXT_REPO}
 RUN bench init \
   --frappe-branch=${FRAPPE_BRANCH} \
   --frappe-path=${FRAPPE_PATH} \