.NET 5 On APP Platform. Failing Health Checks.

I am unable to get my health checks to pass. Not enough information is present in the log to help me diagnose.

My app spec is

name: div-4-io
region: sfo
services:
- dockerfile_path: /div4.io/div4.io/Dockerfile
  github:
    branch: main
    deploy_on_push: true
    repo: Division4Studios/div4.io
  health_check:
    http_path: /health
  http_port: 8080
  instance_count: 1
  instance_size_slug: basic-xxs
  name: div-4-io
  routes:
  - path: /
  source_dir: /div4.io/

[2021-07-22 02:43:24] warn: Microsoft.AspNetCore.DataProtection.Repositories.FileSystemXmlRepository[60]
[2021-07-22 02:43:24]       Storing keys in a directory '/root/.aspnet/DataProtection-Keys' that may not be persisted outside of the container. Protected data will be unavailable when container is destroyed.
[]

This is the last line on my deployment log.