Update health endpoint to reflect other apps

[psoleckimoj]

Context

Does this issue have a Jira ticket?

No.

If this is an issue, do we have steps to reproduce?

Intent

What changes are introduced by this PR that correspond to the above ticket?

This updates the output of the /health endpoint to match the standard used across frontend apps to help with status checking in the developer portal for the SRE and service teams.

Would this PR benefit from screenshots?

Considerations

Is there any additional information that would help when reviewing this PR?

Are there any steps required when merging/deploying this PR?

Checklist

• This PR contains only changes related to the above ticket
• Tests have been added/updated to cover the change
• Documentation has been updated where appropriate
• Tested in Development

[madebyzak]

LGTM!