fix(docker): change node healthcheck from EKG to Prometheus

The legacy EKG port (12788) is not exposed by default in recent
trace-dispatcher configurations. Switching to 12798/metrics
ensures db-sync can verify node readiness.

Author: ArturWieczorek

docker-compose.yml

@@ -43,7 +43,7 @@ services:
     healthcheck:
       # Ping the EKG port to see if it responds.
       # Assuming if EKG isn't up then the rest of cardano-node isn't either.
-      test: ["CMD-SHELL", "curl -f 127.0.0.1:12788 || exit 1"]
+      test: ["CMD-SHELL", "curl -f 127.0.0.1:12798/metrics || exit 1"]
       interval: 60s
       timeout: 10s
       retries: 5