install and tag node and nginx images (CORD-435)

Change-Id: I1232deb57c2894d37f2f7b9c36e40f4575886099
diff --git a/roles/xos-install/tasks/main.yml b/roles/xos-install/tasks/main.yml
index 378ccc7..7154205 100644
--- a/roles/xos-install/tasks/main.yml
+++ b/roles/xos-install/tasks/main.yml
@@ -172,6 +172,8 @@
     - xosproject/xos-postgres
     - xosproject/cord-app-build
     - redis
+    - nginx
+    - node
   tags:
     - skip_ansible_lint
 
@@ -182,6 +184,11 @@
     - xosproject/xos-postgres
     - xosproject/cord-app-build
     - redis
+    - nginx
+  when: docker_registry_check|succeeded
+
+- name: Separately tag the node image with tag argon
+  command: docker tag {{ docker_registry }}/node:{{ docker_tag }} node:argon
   when: docker_registry_check|succeeded