Merge pull request #2293 from codalab/env_sample_update

ENV - added / at the end of the url

Author: Didayolo

.env_sample

@@ -69,7 +69,7 @@ AWS_STORAGE_PRIVATE_BUCKET_NAME=private
 AWS_S3_ENDPOINT_URL=http://minio:9000/
 AWS_QUERYSTRING_AUTH=False
 # Optional URL rewriting in compute worker, format: FROM | TO
-#WORKER_BUNDLE_URL_REWRITE=http://localhost:9000|http://minio:9000
+#WORKER_BUNDLE_URL_REWRITE=http://localhost:9000/|http://minio:9000/
 
 
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