1. 병아리의 입수

2. 프로그램 작성

package com.example.demo;

import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("hello")
public class HelloController {

    @GetMapping("")
    public String index(Model model) {
        return "Hello!!";
    }
}

3. 실행