When the docker server stops responding:

1) restart the Digital Ocean droplet

2) enumerate the containers that need to be restarted: docker ps | grep “About a minute ago”

3) for each of them: docker start [container-id] (here’s a script you can use: https://gist.github.com/tomaszzielinski/b22ebf146796218995d6)

4) go to launcher’s admin and for each of those sites run the “Refresh routes” admin action