add checkpoint storage

Author: ajithvcoder

.github/workflows/ec2-pipeline.yml

@@ -149,7 +149,7 @@ jobs:
           touch best_model_checkpoint.txt
           docker run --rm --gpus=all \
             -v model_storage:/workspace/model_storage \
-            -v best_model_checkpoint.txt:/workspace/best_model_checkpoint.txt
+            -v best_model_checkpoint.txt:/workspace/best_model_checkpoint.txt \
             -e AWS_ACCESS_KEY_ID=${{ secrets.AWS_ACCESS_KEY_ID }} \
             -e AWS_SECRET_ACCESS_KEY=${{ secrets.AWS_SECRET_ACCESS_KEY }} \
             -e AWS_DEFAULT_REGION=${{ secrets.AWS_REGION }} \