Add Synology NAS storage provider docs

docs/provider/storage/synology-nas.md

@@ -0,0 +1,33 @@
+---
+title: Synology NAS
+description: Using Synology NAS as a storage provider for Casdoor
+keywords: [Synology, NAS, storage, provider]
+authors: [xiao-kong-long]
+---
+
+:::note
+
+This is an example of **Synology NAS**.
+
+:::
+
+### Fill in the necessary information in Casdoor
+
+There are five required fields: `Client ID`, `Client secret` and `Endpoint`. The corresponding relationship to the Synology NAS account is as follows:
+
+| Name                | Name in Tencent | Required |
+|---------------------|-----------------|----------|
+| Client ID           | SecretId        | Yes      |
+| Client secret       | SecretKey       | Yes      |
+| Endpoint            | Endpoint        | Yes      |
+| Bucket              |                 |          |
+| Path prefix         |                 |          |
+| Domain              |                 |          |
+| Region ID           |                 |          |
+
+#### Configure Casdoor provider
+
+![synologyConfig.png](/img/providers/storage/synologyConfig.png)
+
+
+You can refer to the official documentation for configuration: [link](https://www.synology.cn/zh-cn/support/developer#tool)

sidebars.js

@@ -232,6 +232,7 @@ module.exports = {
             "provider/storage/minio",
             "provider/storage/aliyun-oss",
             "provider/storage/tencentCloudCOS",
+            "provider/storage/synology-nas",
           ],
         },
         {