nbreport users would like to include assets alongside the templated notebook, and have those assets copied into place when the report is instantiated. These assets might be Python modules that the notebook imports. Or it might be image files or general data files, or a directory tree full of data files.
nbreport can support this by adding a configuration key to the nbreport.yaml file format. The copy-on-instantiation feature should replicate any directory structure of these assets relative to the notebook.