add redis to accelerate access of minio (#482)

### What problem does this PR solve?

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

docker/service_conf.yaml

@@ -13,6 +13,10 @@ minio:
   user: 'rag_flow'
   password: 'infini_rag_flow'
   host: 'minio:9000'
+redis:
+  db: 1
+  password: 'infini_rag_flow'
+  host: 'redis:6379'
 es:
   hosts: 'http://es01:9200'
 user_default_llm: