The ip looks like no effect in webconfig, but it is changed anyway

src/main/java/com/ffii/lioner/config/WebConfig.java

@@ -19,7 +19,7 @@ public class WebConfig implements WebMvcConfigurer {
           .allowedOrigins(
             "http://localhost",       // If you test locally via Nginx at http://localhost
             "http://127.0.0.1",       // Sometimes browsers resolve localhost to 127.0.0.1
-            "http://52.175.15.19",    // Your 2fi-uat frontend IP            
+            "http://20.2.170.164",    // Look like no use           
             "http://localhost:3000" // If you ever run React dev server directly
             // Add any other specific domains/IPs/ports where your frontend will be hosted
         )