fix spring-cloud-gateway project setup, update boot version

spring-cloud/spring-cloud-gateway/src/main/java/com/baeldung/spring/cloud/GatewayApplication.java

@@ -0,0 +1,12 @@
+package com.baeldung.spring.cloud;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class GatewayApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(GatewayApplication.class, args);
+    }
+}

spring-cloud/spring-cloud-gateway/src/main/resources/application.yml

@@ -0,0 +1,13 @@
+server:
+  port: 80
+spring:
+  cloud:
+    gateway:
+      routes:
+      - id: baeldung_route
+        uri: http://www.baeldung.com
+        predicates:
+        - Path=/baeldung
+management:
+  security:
+    enabled: false