The plug-in supports subdirectories when it is built through dockerfile（插件通过Dockerfile构建时支持子目录）

[yangkaa]

当前，在通过Dockerfile创建插件时，不支持选择子目录的形式进行构建。当用户将多个插件的 Dockerfile 放在一个仓库中时，则无法选择指定的插件进行构建。

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Currently, building a subdirectory is not supported when creating a plugin via a Dockerfile. When users put the Dockerfiles of multiple plugins in one repository, they cannot select the specified plugin to build.