[Doc] csv check

README.md

@@ -42,6 +42,11 @@ To update events, update `dogadjaji.csv` then run:
 make events
 ```
 
+For checking the csv data, suggestion is the [tennis pkg](https://github.com/gurgeous/tennis), with example command:
+```sh 
+tennis -nt --zebra --color on --theme dark --tail 20 dogadjaji.csv  
+```
+
 
 ## TODO: