Document environment setup requirements

[blancharda]

Overview

When attempting to deploy UDS core into a deployment of uds-k3d in a fresh EC2 instance, I quickly ran into a too many open files error.

My ulimit was very low by default -- easy to fix.. but it would be nice to have recommended environment settings / considerations documented here.

I know this example is specific to UDS Core (a different repo), but I don't think the issue itself is unique to that repo, it's more a requirement of the environment where uds-k3d is being installed.