docs: update custom builtin plugin document

website/docs/advanced-usage/custom-builtin-plugin.md

@@ -33,7 +33,7 @@ When the editing is completed, save it and make sure the current directory is in
 Execute the command to compile your own image
 
 ```bash
-docker build . -t tailchat
+docker build -t tailchat .
 ```
 
 Where `.` represents the current directory, `-t tailchat` represents the compiled tag is `tailchat`, which can be read directly by the `docker-compose.yml` file

website/i18n/zh-Hans/docusaurus-plugin-content-docs/current/advanced-usage/custom-builtin-plugin.md

@@ -33,7 +33,7 @@ vim client/web/src/plugin/builtin.ts
 执行命令编译自己的镜像
 
 ```bash
-docker build . -t tailchat
+docker build -t tailchat .
 ```
 
 其中 `.` 表示当前目录，`-t tailchat` 表示编译的标签是 `tailchat`, 这可以直接被 `docker-compose.yml` 文件读取