Fix our perimeter target group alarms so that we receive alerts when they are actaully unhealthy

**Describe the Issue**
- Right now the health check for the target groups created in the perimeter account is setup at path / which is causing the alarm to trigger even if the actual client application is having a problem.
- Right now the target group setup is done with the dynamodb table entry and we want to see if it is possible to add a health checker path to that configuration
- If that's possible we need to update the target group configuration in the DNS layer terraform module to include that and test it out
**Additional Context**
Add any other context, attachments or screenshots

**Acceptance Criteria**
- SPIKE work done to see if adding a health check path is supported
- Add the configuration if that is supported