Add NOTICE file and update gitignore file
diff --git a/.gitignore b/.gitignore
index c9d16aa..1a90945 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,10 @@
# Created by https://www.gitignore.io/api/c++,node,linux,macos,windows
# Edit at https://www.gitignore.io/?templates=c++,node,linux,macos,windows
+### IDE ###
+.idea
+idea/*
+
### C++ ###
# Prerequisites
*.d
diff --git a/NOTICE b/NOTICE
new file mode 100644
index 0000000..309831a
--- /dev/null
+++ b/NOTICE
@@ -0,0 +1,5 @@
+Apache RocketMQ
+Copyright 2016-2019 The Apache Software Foundation
+
+This product includes software developed at
+The Apache Software Foundation (http://www.apache.org/).
\ No newline at end of file
