[ci/#26]: health check 설정

Author: khwoowoo

src/main/java/com/wekids/baas/aws/HealthController.java

@@ -0,0 +1,12 @@
+package com.wekids.baas.aws;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class HealthController {
+    @GetMapping("/health")
+    public String healthCheck() {
+        return "I'm healthy";
+    }
+}