try new hostname setting

Signed-off-by: Peter Siegmund <developer@mars3142.org>

src/main/resources/application.yaml

@@ -5,7 +5,7 @@ eureka:
     service-url:
       defaultZone: http://eureka-service.web:8761/eureka
   instance:
-    instanceId: ${spring.application.name}:${spring.application.instance_id:${random.value}}
+    hostname: ${HOSTNAME:${spring.application.name}:${spring.application.instance_id:${random.value}}}
 
 info:
   application: