fix: update .env.example configuration order and defaults

- Change default STORAGE_TYPE from 'local' to 'opendal' for consistency
- Move ClickZetta Volume configuration before S3 configuration for better organization
- Maintain clear grouping of storage configurations

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker/.env.example

@@ -315,7 +315,16 @@ CONSOLE_CORS_ALLOW_ORIGINS=*
 # ------------------------------
 
 # The type of storage to use for storing user files.
-STORAGE_TYPE=local
+STORAGE_TYPE=opendal
+
+# Apache OpenDAL Configuration
+# The configuration for OpenDAL consists of the following format: OPENDAL_<SCHEME_NAME>_<CONFIG_NAME>.
+# You can find all the service configurations (CONFIG_NAME) in the repository at: https://github.com/apache/opendal/tree/main/core/src/services.
+# Dify will scan configurations starting with OPENDAL_<SCHEME_NAME> and automatically apply them.
+# The scheme name for the OpenDAL storage.
+OPENDAL_SCHEME=fs
+# Configurations for OpenDAL Local File System.
+OPENDAL_FS_ROOT=storage
 
 # ClickZetta Volume Configuration (for storage backend)
 # To use ClickZetta Volume as storage backend, set STORAGE_TYPE=clickzetta-volume
@@ -336,16 +345,6 @@ CLICKZETTA_VOLUME_TABLE_PREFIX=dataset_
 # Dify file directory prefix (isolates from other apps, recommended to keep default)
 CLICKZETTA_VOLUME_DIFY_PREFIX=dify_km
 
-
-# Apache OpenDAL Configuration
-# The configuration for OpenDAL consists of the following format: OPENDAL_<SCHEME_NAME>_<CONFIG_NAME>.
-# You can find all the service configurations (CONFIG_NAME) in the repository at: https://github.com/apache/opendal/tree/main/core/src/services.
-# Dify will scan configurations starting with OPENDAL_<SCHEME_NAME> and automatically apply them.
-# The scheme name for the OpenDAL storage.
-OPENDAL_SCHEME=fs
-# Configurations for OpenDAL Local File System.
-OPENDAL_FS_ROOT=storage
-
 # S3 Configuration
 #
 S3_ENDPOINT=