Health check fails with Docker image even though endpoint is reachable

Question

Project ID: abcb52a5-176a-41aa-94a7-4e2939f68f06

My project has a couple of deployments of [this Docker image](https://github.com/Brendonovich/MacroGraph/pkgs/container/macrograph-server), which exposes an `/api/health` endpoint that responds with an empty 200.
The health check endpoint is reachable from the current deployment (https://dev.macrograph.app/api/health), but when I add `/api/health` as a health check endpoint the deployment never succeeds.

![image.png](https://station-server.railway.com/attachments/att_01kjrjee4hfq8sbcpc3wnh8fde)