后台目录结构大调整，让结构更清晰

jeecg-server-cloud/jeecg-cloud-nacos/src/main/java/com/alibaba/nacos/JeecgNacosApplication.java

@@ -0,0 +1,47 @@
+package com.alibaba.nacos;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.servlet.ServletComponentScan;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.ui.Model;
+import org.springframework.web.bind.annotation.GetMapping;
+
+import javax.servlet.http.HttpServletResponse;
+
+/**
+ * Nacos 启动类
+ *
+ * @author zyf
+ */
+@SpringBootApplication(scanBasePackages = "com.alibaba.nacos")
+@ServletComponentScan
+@EnableScheduling
+public class JeecgNacosApplication {
+
+    /** 是否单机模式启动 */
+    private static String standalone = "true";
+    /** 是否开启鉴权 */
+    private static String enabled = "false";
+
+    public static void main(String[] args) {
+        System.setProperty("nacos.standalone", standalone);
+        System.setProperty("nacos.core.auth.enabled", enabled);
+        System.setProperty("server.tomcat.basedir","logs");
+        //自定义启动端口号
+        System.setProperty("server.port","8848");
+        SpringApplication.run(JeecgNacosApplication.class, args);
+    }
+
+    /**
+     * 默认跳转首页
+     *
+     * @param model
+     * @return
+     */
+    @GetMapping("/")
+    public String index(Model model, HttpServletResponse response) {
+        // 视图重定向 - 跳转
+        return "/nacos";
+    }
+}