patchwork-builder

$ npm clone https://github.com/ssbc/patchwork-builder
$ cd patchwork-builder
$ npm install
$ git clone https://github.com/ssbc/patchwork app
$ npm run update
$ npm run release

dependencies

You'll need some more dependencies to create builds.

See the electron-builder wiki page: Multi Platform Build

On linux you'll need a few more deps:

sudo apt-get install icnsutils graphicsmagick