What do I need to know about on-prem deployment?

We (Asteroid W25) haven't deployed our software (https://asteroid.ai) to an enterprise customer on premises before. The customer needs to run our platform offline in an airgapped environment. The project is containerised and orchestrated with docker compose currently. The client is fine to not receive the source code and is happy to just receive pre-built images.

I think a fair few problems are going to arise here, namely things like: shipping regular updates, multi-arch builds etc.

Does anyone here have a good list of things we should be thinking about when doing our first on-premises deployment, or other points/resources we should have in mind?

Much appreciated

Joe