feat: add health check api

Author: Aaron3S

backend/web/src/main/java/org/jumpserver/chen/web/controller/HealthCheckController.java

@@ -0,0 +1,15 @@
+package org.jumpserver.chen.web.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/healthy")
+public class HealthCheckController {
+
+    @GetMapping("")
+    public String healthCheck() {
+        return "ok";
+    }
+}