fix: 로컬 환경(Windows)에서 Folder Picker(AWT)가 작동하도록 Spring Boot headless 모드 비활성화

dat-gateway/src/main/java/io/shinhanlife/dat/mcg/DatGatewayApplication.java

@@ -27,6 +27,6 @@ import org.springframework.scheduling.annotation.EnableScheduling;
 @EnableScheduling
 public class DatGatewayApplication {
     public static void main(String[] args) {
-        SpringApplication.run(DatGatewayApplication.class, args);
+        new org.springframework.boot.builder.SpringApplicationBuilder(DatGatewayApplication.class).headless(false).run(args);
     }
 }