Speed up deploy time on Digital Ocean droplet

What I encounter when running a droplet on Digital Ocean ($5 account) is when you deploy an update it can sometimes take a very long time to finish… I have had deploy-times of more than an hour. :-S
I figured out that before you do a deployment, go to your target settings and in the docker machines panel, restart the machine.
After the droplet has been restarted the deployment time is almost as fast as on localhost.