Changed SomeController to be a health check

server/src/main/java/server/api/HealthCheckController.java

@@ -1,17 +1,16 @@
-package server;
+package server.api;
 
-import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
 
-@Controller
+@RestController
 @RequestMapping("/")
-public class SomeController {
-
+public class HealthCheckController {
     @GetMapping("/")
     @ResponseBody
     public String index() {
-        return "Hello world!";
+        return "Server is online!";
     }
 }