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+++ b/README.md
@@ -1,5 +1,7 @@
 ## Aggiorna IP e certificati SSL di IONOS
 
+derivato da [github link](https://github.com/lazaroblanc/IONOS-DynDNS/tree/main)
+
 inserire le variabili in start.sh o in docker-compose
 
 	EMAIL=fabio.micheluz@gmail.com