The plugin id 'spring-boot' is deprecated. Please use 'org.springframework.boot' instead.とのこと
The plugin id 'spring-boot' is deprecated. Please use 'org.springframework.boot' instead.とのこと

backpaper0/spring-boot-sandbox,backpaper0/spring-boot-sandbox,backpaper0/spring-boot-sandbox,backpaper0/spring-boot-sandbox