add NOTICE
diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..7a95db5
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,6 @@
+Apache Dubbo
+Copyright 2018-2020 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
+