Gets rid of hardcoded Db creds

src/main/java/com/best/spring/controller/PingController.java

@@ -0,0 +1,16 @@
+package com.best.spring.controller;
+
+import com.best.spring.dto.PingDTO;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/ping")
+public class PingController {
+
+    @GetMapping
+    public PingDTO getAllCourses() {
+        return new PingDTO();
+    }
+}

src/main/java/com/best/spring/dto/PingDTO.java

@@ -0,0 +1,13 @@
+package com.best.spring.dto;
+
+public class PingDTO {
+    private String message = "Hello World!";
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+}