Docker is ending Docker Cloud on 2018 May 21, or at least cluster services. Most of my web apps are running on Docker Cloud right now so I am working to move them elsewhere. There are options including Docker Enterprise, Azure Container Service, and Google Kubernetes Engine. Right now I am leaning towards running my own Docker CE swarm on Digital Ocean droplets and Amazon EC2 instances.
This is a bit painful since I must learn and test new applications and code. But I've seen some great stuff from Docker swarm and also Kubernetes Engine. New problems beget new opportunities to learn.