Deploying an auto-updating after build

[iammdmusa]

Thank @reZach and all others Who contributes to this project. One of the best Electron Starter repo IMO. But it's missing one of the key feature "Auto Update after build/package"

Motivation:
As Developer, we worked on software that could lead to a bug or sometime that necessary to change after the build. If the Application is an agile, then continuous development is must.
In this case, Auto-update after deployment will be a great feature to have.

[reZach]

Thank you for your kind words, @iammdmusa.

Does the comment in main.js help get you started with this? I commented it out because the needs of deploying an application I felt were not the same between all people who might use this template, so I opted to not include anything built in as everyone's needs would be different.