Added colab working example for metrics folder

README.md

@@ -160,6 +160,7 @@ You need to make sure that your model can predict airborne objects for each flig
 ## Local evaluation
 
 You can also test end to end evaluation on your own systems. The scripts are available in `core/metrics` folder.
+A working example is also available as [Colab Notebook here](https://colab.research.google.com/drive/1hobQBEfIxdPtc0jeMBtQKce8flrCKBq1?usp=sharing).
 
 ## Hardware used for evaluations