chore: ENV var changes for new platform

[matthewford]

📝 A short description of the changes

• Allowing the app to pickup and use new ENV variables for backing services on the new platform.

🔗 Link to the relevant story (or stories)

• https://app.asana.com/0/home/18526950394535/1208011108907043

Deployment implications

✅ Checklist

• Features that cannot go live are behind a feature flag/env var or specify deploy date and open PR as draft
• I have checked that commit messages make sense and explain the reasoning for each change
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• I have squashed any unnecessary or part-finished commits

🖼️ Screenshots (if appropriate - no PII/Prod data):

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• To see the specific tasks where the Asana app for GitHub is being used, see below:
  • https://app.asana.com/0/0/1208011108907043