I admit this is a pretty hacky solution, but just in case there is no implemented solution: you can make an alias in your .bashrcas follows:
alias newnb='cp -i ~/templates/jupyter.ipynb new_notebook.ipynb && juypter notebook'
Then the command newnbin your terminal copies the template file to your current directory and calls up a jupyter laptop session in this directory, where you can open new_notebook.ipynbwith this content.