title: Electron-builder - how to run a script after/before installing an app
body: <p>I have an application written in Electron which uses electron-builder. I want to package the app for Linux (Ubuntu and maybe others too) and Mac. But when the application is installing I also need to run a script used to install some third party software.</p>
  
  <p>For Windows (nsis) I know that there is a configuration: <code>"include": "installer.nsh"</code>.</p>
  
  <p>Is there something similar for Linux / Mac that I can use to do this ?
  Thanks in advance !</p>