Hi IntriguedGoldfish14
Yes the way to do that is just use the custom engine example as you did, also correct on the env var to add catboost to the container
You can of course create your own custom container from the base one and pre install any required package, to speedup the container spin time
One of the design decisions was to support multiple models from a single container, that means that there needs to be one environment for all of them, the main issue is if some packages collide, but I think this is relatively rare, is this an issue for you?