If applied, this commit will add gateway real ip

src/main/java/dlt/id/manager/model/IDManager.java

@@ -23,11 +23,11 @@ public IDManager() {
 
     public void start() {
         try {
-            this.ip = InetAddress.getLocalHost().getHostAddress().trim();
+            this.ip = this.getEnvOrDefault("GATEWAY_REAL_IP", InetAddress.getLocalHost().getHostAddress().trim());
             this.id = UUID.randomUUID().toString();
             this.log = Logger.getLogger(IDManager.class.getName());
 
-            this.log.info("IP: " + this.ip);
+            this.log.log(Level.INFO, "IP: {0}", this.ip);
         } catch (UnknownHostException ex) {
             Logger.getLogger(IDManager.class.getName()).log(Level.SEVERE, null, ex);
         }
@@ -45,5 +45,10 @@ public String getIP() {
     public String getID() {
         return this.id;
     }
+
+    private String getEnvOrDefault(String env, String defaultValue){
+        String value = System.getenv(env);
+        return value == null ? defaultValue : value;
+    }
 
 }