Don't open console with output on app launch

[morremeyer]

Is your feature request related to a problem? Please describe.
The standalone version should not open a console with the log output when it launches.

Describe the solution you'd like
No console opened when starting the binary.

Describe alternatives you've considered
None

Additional context

This can be achieved (platform dependent) with further systray configuration or by shipping an application bundle, see https://github.com/getlantern/systray#platform-notes.

Building an app bundle might also be possible with goreleaser: goreleaser/goreleaser#2650

[morremeyer]

Depends on a solution for #37.

[morremeyer]

Maybe check https://medium.com/@paul_25993/combining-web-app-and-go-into-a-single-executable-or-container-e2987cb0f304?