demo/src/main/java/com/example/demo/DemoApplication.java

@@ -8,7 +8,7 @@ public class DemoApplication {
 
 	public static void main(String[] args) {
 		SpringApplication.run(DemoApplication.class, args);
-		System.out.println("Hello");
+		System.out.println("Hello world");
 	}
 
 }