Documentation updates for fault domain and ADDITIONAL_ENV_FILE

[gm42]

Description

Two changes:

• remove non-working example about fictitious spec.zoneName
• mention that spec.sidecarVariables must be declared in the FoundationDB k8s object

Type of change

• Documentation

Discussion

None

Testing

None; the existing test does not cover the sidecarVariables aspect, but that's fine.

Documentation

This is a minor documentation update.

Follow-up

None needed, unless the examples need rework.

[gm42]

Alternatively, I could leave the non-working example and put there a question mark ? in place of spec.zoneName

[gm42]

I added another commit to document ADDITIONAL_ENV_FILE, as I thought it's useful and relevant for split images. The unified image also has a similar mechanism, so we might want to use that one when it's no more considered under development.

[brownleej]

👍