Right now I use it for demos... We use a stack that is little complex for someone wanting a quick taste. So provided they have a modern Linux with with docker installed they can quickly do a self demo.
And if they don't, well having a fresh image that is easily rebuildable makes it easier for me to give demos than to spin fresh VMs. Arguably I could have done the same with Vagrant, but really didn't need the overhead of the VM.
This is really cool to hear. If you're interested in having us know more about your project, I'd be more than happy to take the time. Information is in my profile.
And if they don't, well having a fresh image that is easily rebuildable makes it easier for me to give demos than to spin fresh VMs. Arguably I could have done the same with Vagrant, but really didn't need the overhead of the VM.
But for using it in deployment, no.