Fix log item on document menu

docs/configuration/log.md → docs/configuration/log/index.md

@@ -1,3 +1,5 @@
+# Log
+
 ### Structure
 
 ```json

docs/configuration/log.zh.md → docs/configuration/log/index.zh.md

@@ -1,3 +1,5 @@
+# 日志
+
 ### 结构
 
 ```json

mkdocs.yml

@@ -37,7 +37,8 @@ nav:
       - Change Log: changelog.md
   - Configuration:
       - configuration/index.md
-      - Log: configuration/log.md
+      - Log:
+          - configuration/log/index.md
       - DNS:
           - configuration/dns/index.md
           - DNS Server: configuration/dns/server.md