Right now only the web developer with DevOps experience can put people on Docker and interact with Docker files. There will be in the future, likely over the next 2-3 years you will start to see services that will enable the common individual to work with and add to docker files from a web admin panel. Doing things like adding your docker container to Kubernetes clusters or adding additional software to your container. Basically, with the docker file, they have turned server administration into a scripting language which is all in one single file. That single file can pull your os image and website media files from remote servers allowing you to move your docker container around the web from different cloud compute resource providers. It is a revolutionary technology which will forever change hosting. Its speed in executing php/mysql is twice that of any server on traditional hosting I have ever seen which gives major advantages in seo. I never was able to get any cpanel server under 50 ms load time (1/2 second) but I see on docker 25ms load times on php mysql (1/4 second). The way it executes things is very unique in that it doesn’t start from point “A” like a computer has to boot up top get to point B in its execution but rather picks up in the middle preserves the request then goes idle back to the middle when done. In other words, the server is no longer running after its request for the page is complete, its only running when its viewed.
In the future, there will be lots of portability with a docker container across the web and importing it into other advanced apps that can run along with your website or transferring your Docker file to a new compute resource provider as compute resource providers get cheaper with distributed and decentralized compute the same as you can get storage resources. Your compute providers location will be able to change to where the bulk of your traffic is coming from in other words it will move across clusters, for example, you might open a website in the USA but it ends up getting more traffic on the east coast for some reason then your website will move into computing resource providers with less latency and in the future, it will be able to do this automatically even acquire more CPU if it needs it and only pay or what it uses. In other words, using less CPU at night vs the day and only paying for what you used.