Where I found to configure a custom build
https://gist.github.com/layerssss/5d7b69c0f8c6e54e8b501e6e0fe36186

there is a bit of tooling to setup. there is also some things to consider
- required to publish 
- required in location build/elctron-publish-custom.js
- main.js autoUpdater.on methods

I discovered if the publish folder is in the root, the build kept adding all those files to the installer
The installer didn't put them anywhere that I found.
The installer was greater than 1 gb when I noticed.
The build was taking a lot of time until I moved the publish folder.

I feel the installer should be per user. The per machine requires administrative access.

I was able to work out the process that allowed the autoupdater to run before the window is shown. 
We should display a window that an update is downloading. This will keep the user from clicking multiple times.
That can be displayed in the `update-available` event.