Add new variable: applist, to support multiple synchronizer apps
diff --git a/xos/xos_config b/xos/xos_config
index b86d618..c47fac6 100644
--- a/xos/xos_config
+++ b/xos/xos_config
@@ -37,6 +37,7 @@
 images_directory=/opt/xos/images
 dependency_graph=/opt/xos/model-deps
 logfile=/var/log/xos_backend.log
+applist=helloworld
 
 [gui]
 disable_minidashboard=True