spring-boot-rest/spring-boot/src/main/java/org/baeldung/boot/DemoApplication.java

package org.baeldung.boot;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DemoApplication {

    public static void main(String[] args) {
        System.setProperty("spring.config.name", "demo");
        SpringApplication.run(DemoApplication.class, args);
    }
}