You can configure IBM App Connect Enterprise to run in a Docker container on AIX®, Linux®, and Windows systems, and in IBM z/OS® Container Extensions (zCX). ...

Can AIX be containerized?

No. It is impossible to build AIX and HP-UX docker containers because the AIX and HP-UX are totally different operation systems with differently build closed SystemV kernels running only on RISC based CPU's compared to the wide spread Linux distributions running on almost everything.

Can you run a full OS in Docker?

Containers can be full blown OS's, they just don't have to be (neither do VMs for that matter, it's just more complicated to configure and manage). I would say the whole point of Docker is to make application containers easy, so that you only have to configure an app, not the whole OS.