feat(medusa): Add streaming to Minio fileservice (#1619)

packages/medusa-file-minio/README.md

@@ -12,5 +12,27 @@ Learn more about how you can use this plugin in the [documentation](https://docs
   bucket: "test",
   access_key_id: "YOUR-ACCESS-KEY",
   secret_access_key: "YOUR-SECRET-KEY",
+
+  // private bucket configuration
+  private_bucket: 'private-bucket',
+  private_access_key_id: "YOUR-ACCESS-KEY",
+  private_secret_access_key: "YOUR-SECRET-KEY",
 }
 ```
+
+Optionally a `download_url_duration` option can be specified to change the valid duration of presigned download links. The duration is configured in seconds. (Default = 60 seconds)
+
+## Configuring a private bucket in Minio
+
+Certain operations in Medusa such as data import and export require a separate, protected bucket. The plugin will raise an error if operations used for imports and exports are invoked without the correct setup.
+
+Configuring Minio for requires configuration of one additional option: `private_bucket` which refers to the name given to the protected bucket in Minio.
+
+Separate credentials can, optionally, be used to access the private bucket by configuring the following options:
+
+```
+  private_access_key_id: "YOUR-ACCESS-KEY",
+  private_secret_access_key: "YOUR-SECRET-KEY",
+```
+
+If no separate access key is given the same access key will be used for both the `bucket` and the `private_bucket`.