docs: Update local evaluation documentation

Flagsmith / flagsmith

Open Source Feature Flagging and Remote Config Service. Host on-prem or use our hosted version at https://flagsmith.com/

BSD 3-Clause "New" or "Revised" License

4.9k stars 375 forks source link

Thanks for submitting a PR! Please check the boxes below:

[x] I have added information to docs/ if required so people know about the feature!
[x] I have filled in the "Changes" section below?
[x] I have filled in the "How did you test this code" section below?
[x] I have used a Conventional Commit title for this Pull Request

Changes

This makes the local evaluation documentation represent current state after all the remaining projects in production are migrated to V2.

I've added a more accurate description of what currently constitutes an environment document, and emphasised the caveat of having to provide a full set of traits even when an identity override is present.