Update README.md

README.md

@@ -52,6 +52,7 @@ enroot start --rw --mount ${PWD}/data:/data --mount ${PWD}/results:/results nnun
 python download.py --task 01
 python preprocess.py --task 01 --dim 2
 ```
+Exit the image.
 - For benchmarking purpose, we use 1000 copied of a single image 
 ```
 mv data data_orig