Shutdown/Stop Docker

Hello all,
Is it possible to shutdown or stop Docker for Mac? I realize this could have an impact on running docker commands and such but it would be nice to turn it off when I don’t need it. Every once in a while CPU usage spikes and it’s always Docker for Mac. (I do think that itself should be looked into but I’d be happy being able to shutdown Docker when not in use.)

I must have a wedged Docker.app process (and children) because quitting the whale doesn’t kill Docker.