chore: add baidu-obs and supabase for .env.example (#9289)

docker/.env.example

 # ------------------------------
 
 # The type of storage to use for storing user files.
-# Supported values are `local` and `s3` and `azure-blob` and `google-storage` and `tencent-cos` and `huawei-obs`
+# Supported values are `local` , `s3` , `azure-blob` , `google-storage`, `tencent-cos`, `huawei-obs`, `volcengine-tos`, `baidu-obs`, `supabase`
 # Default: `local`
 STORAGE_TYPE=local
 
 # The region of the Volcengine TOS service.
 VOLCENGINE_TOS_REGION=your-region
 
+# Baidu OBS Storage Configuration
+# The name of the Baidu OBS bucket to use for storing files.
+BAIDU_OBS_BUCKET_NAME=your-bucket-name
+# The secret key to use for authenticating with the Baidu OBS service.
+BAIDU_OBS_SECRET_KEY=your-secret-key
+# The access key to use for authenticating with the Baidu OBS service.
+BAIDU_OBS_ACCESS_KEY=your-access-key
+# The endpoint of the Baidu OBS service.
+BAIDU_OBS_ENDPOINT=your-server-url
+
+# Supabase Storage Configuration
+# The name of the Supabase bucket to use for storing files.
+SUPABASE_BUCKET_NAME=your-bucket-name
+# The api key to use for authenticating with the Supabase service.
+SUPABASE_API_KEY=your-access-key
+# The project endpoint url of the Supabase service.
+SUPABASE_URL=your-server-url
+
 # ------------------------------
 # Vector Database Configuration
 # ------------------------------