maven - pom.xml org.postgresql postgresql runtime  application.propertiesspring.datasource.url=jdbc:postgresql://localhost:5432/postgresspring.datasource.username=유저이름spring.datasource.password=비밀번호  예시 Entity 코드package com.example.testproject.data.entity;import jakarta.persistence.Entity;import jakarta.persistence.Id;import jakarta.persistence.Table;import lombok.*;@Entity@Getter@Sette..