Initialize an instance from a :class:`Work` instance.

def from_node(cls, work):
        """Initialize an instance from a :class:`Work` instance."""
        new = super().from_node(work)

        # Will put all files found in outdir in GridFs
        # Warning: assuming binary files.
        d = {os.path.basename(f): f for f in work.outdir.list_filepaths()}
        new.register_gridfs_files(**d)

        return new