update readme policies

README.md

@@ -13,3 +13,7 @@ You should follow the following naming syntax:
 - Data file could be added for each policy. It must be named `data.json` and placed in the same directory:
     > Example: `{group}/{policyName}/{version}/data.json`
 
+## License
+<hr/>
+
+[Apache 2.0 license](LICENSE)
\ No newline at end of file