Add boto_bucket to example config

Registry won't connect to s3 with example config because of missing bucket. Adding boto_bucket makes the example config work.

Author: palquel

README.md

@@ -99,6 +99,7 @@ prod:
     s3_access_key: _env:AWS_S3_ACCESS_KEY
     s3_secret_key: _env:AWS_S3_SECRET_KEY
     s3_bucket: _env:AWS_S3_BUCKET
+    boto_bucket: _env:AWS_S3_BUCKET
     storage_path: /srv/docker
     smtp_host: localhost
     from_addr: [email protected]