Added note about s3 bucket

Author: john-b-yang

README.md

@@ -20,3 +20,11 @@ python main.py configs/robocode.yaml
 python main.py configs/robotrumble.yaml
 python main.py configs/corewar.yaml
 ```
+
+For storing `logs/`, we're maintaining an AWS S3 bucket (`s3://codeclash`).
+```bash
+# To backup your logs:
+aws s3 sync logs/ s3://codeclash/logs/
+# To retrieve logs
+aws s3 sync s3://codeclash/logs/ logs/
+```