Backup: Don't trigger alerts for warnings

coreos-config/plays/templates/backup.sh.j2

@@ -61,6 +61,7 @@ if [ ${global_exit} -eq 0 ]; then
 elif [ ${global_exit} -eq 1 ]; then
     info "Backup and/or Prune finished with warnings"
     /usr/bin/curl -fsS -m 10 --retry 5 -o /dev/null "https://monitor.chaoswg.org/api/push/${PUSH_KEY}?msg=OK&ping="
+    exit 0 # We dont want to get notified about warnings as this would make the systemd unit fail.
 else
     info "Backup and/or Prune finished with errors"
 fi