added default controller

src/main/java/com/altimetrik/controllers/Default.java

+package com.altimetrik.controllers;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.http.MediaType;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping(value = "/")
+public class Default {
+
+	@GetMapping(value = "/", produces = MediaType.APPLICATION_JSON_VALUE, consumes = MediaType.ALL_VALUE)
+	public ResponseEntity<String> getUserDetailByGitlabEmailId() {
+
+		return new ResponseEntity<>("Wecome to Playground...Java-007", HttpStatus.OK);
+
+	}
+
+}