Move var from rag.settings to common.globals (#11022)

### What problem does this PR solve?

As title.

### Type of change

- [x] Refactoring

---------

Signed-off-by: Jin Hai <haijin.chn@gmail.com>

rag/utils/minio_conn.py

@@ -20,8 +20,8 @@ from minio import Minio
 from minio.commonconfig import CopySource
 from minio.error import S3Error
 from io import BytesIO
-from rag import settings
 from common.decorator import singleton
+from common import globals
 
 
 @singleton
@@ -38,14 +38,14 @@ class RAGFlowMinio:
             pass
 
         try:
-            self.conn = Minio(settings.MINIO["host"],
-                              access_key=settings.MINIO["user"],
-                              secret_key=settings.MINIO["password"],
+            self.conn = Minio(globals.MINIO["host"],
+                              access_key=globals.MINIO["user"],
+                              secret_key=globals.MINIO["password"],
                               secure=False
                               )
         except Exception:
             logging.exception(
-                "Fail to connect %s " % settings.MINIO["host"])
+                "Fail to connect %s " % globals.MINIO["host"])
 
     def __close__(self):
         del self.conn