Service self updater

[elpiel]

The updater should update all binaries together to remove the complexity of updating them separately and keeping versions in control

~This updater should handle updates for:~ ~- node js~ ~- server.js~ ~- ffmpeg~ ~- ffprobe~

~This should happen in such a way that we can know:~ ~1. Which binary has changed and only update it, e.g. ffmpeg and ffprobe will not be update so often~ ~2. Server.js updates should be aligned with the given required ffmpeg, ffprobe and node version.~

[jaruba]

Which binary has changed and only update it, e.g. ffmpeg and ffprobe will not be update so often

I am pretty sure that we discussed this in a channel and decided that the complexity of knowing which part to update is simply too large, we should just update all at once for simplicity, otherwise we are just delaying the release of this project