I'm sorry, I don't quite understand your question. If you want to deploy Docker Containers on the ctrlX CORE you would need to install the ctrlX Container Engine App. The app represents the interface between the resources of the ctrlX CORE and the running containers. Using a snap template, a Docker image application for the ctrlX CORE can be created from a Docker image and the corresponding Docker configuration files.
If you want to learn more about how to use the Container Engine App you can look at the manual and at a how to video:
Container Engine App, Use of Docker® Images on ctrlX CORE, Application Manual
How-to - Depoy Docker Image to Container Engine App
I would really recommend to watch the How-to video I mentioned. Please take a look especially at minute 10:00 of the How-to video. Our expert shows here how to specify ports to open and forward on the container.
In addition, I would recommend to look at the Docker Compose File Reference.
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