간단한 스프링 부트 프로젝트 생성 간단한 코드 작성package com.example.demo;import lombok.Getter;import org.springframework.http.ResponseEntity;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RestController;@RestControllerpublic class DockerController { @GetMapping("/") public ResponseEntity hello(){ return ResponseEntity.ok("Hello, World!"); }}..