Update docker-compose.yml

examples/ghost/docker-compose.yml

@@ -10,7 +10,7 @@ services:
       database:
         condition: service_healthy
     healthcheck:
-      test: "nc localhost 2368 || exit 1"
+      test: "/usr/bin/nc localhost 2368 || exit 1"
       interval: 30s
       timeout: 10s
       retries: 5