How can I verify that the services are running and healthy on a headless server?
You can use curl to make some simple GET requests to the endpoints that report service health:
curl -s http://localhost:18681/PCCIS/V1/Service/Current/Info
curl -s http://localhost:3000/health
curl -s http://localhost:3000/servicesConnection
If curl is unavailable you can use wget:
wget -qO- <URL>