Bamboo cannot find dockerfile

[Xu_Weihong]

I let Bamboo checkout some repos on git, in one folder it contains a file like centosbuilder.dockerfile.

I create a docker build jobs, which set the option to Use an existing Dockerfile located in the task's working directory and the working directory has been pointed to the folder which contains to this dockerfile.

The problem is why the bamboo would said it cannot find a dockerfile?