How to create a .deb and/or an .exe file with electron-react-boilerplate

Question

I created an app with the following command:

$ git clone https://github.com/electron-react-boilerplate/electron-react-boilerplate.git myapp

installed the node modules

$ npm install

and then I built the executables

$ npm run package

Now I find the linux files including the binary here:

$ ls myapp/release/build/linux-unpacked

and the app files for the mac here:

$ ls myapp/release/build

What way there is to generate a .deb file and/or a .exe file, too?