Updated S3 Configuration (markdown)

S3-Configuration.md

@@ -19,6 +19,8 @@ SeaweedFS S3 gateway has two separate configuration systems for different purpos
 weed s3 -config=/path/to/s3.json -filer=localhost:8888
 # OR
 weed server -s3 -s3.config=/path/to/s3.json
+# OR
+weed mini -s3.config=/path/to/s3.json
 ```
 
 ### Configuration Format