Funny enough I went from exactly that to gitlab+netlify setup. You get loads out of the box, HTTPS being the big one. In case you didn't get the reference, the other comment was the top comment for dropbox when it announced funding. In theory yes you can still roll your own dropbox, but we all have limited resources and dropbox and netlify make things so much easier that it's worth paying them money to do it right on the first try and not worry about maintenance.