spring
datasource
 url:jdbc:postgresql://localhost/vcu
    username=postgres
    password=postgresql

spring
datasource
url:jdbc:postgresql://localhost/rocker
    username=postgres
    password=postgresql

server.port=8888
spring.profiles.active=native
spring.cloud.config.server.native.search-locations=classpath
spring.config.name=configserver

<dependencies>
   <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-tomcat</artifactId>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

@SpringBootApplication
@Configuration
@EnableAutoConfiguration
@RestController
public class SpaceStudyConfigClientTestApplication {

    @Value("${spring.datasource.url}")
    public String dbName;

    @GetMapping("/loadConfigDetails")
    public String loadDatabaseDetails() {
      return dbName;
    }

    public static void main(String[] args) {
    SpringApplication.run(SpaceStudyConfigClientTestApplication.class,
    args);
  }
}

server.port=8080
spring.profiles.active=default
spring.cloud.config.uri=localhost:8888

FROM openjdk:8
ADD target/SpaceStudyConfigClientTest-0.0.1-SNAPSHOT.war
SpaceStudyConfigClientTest.war
EXPOSE 8080
ENTRYPOINT ["java", "-jar", "-Dspring.profiles.active=rocker" ,
  "SpaceStudyConfigClientTest.war"]

Could not resolve placeholder 'spring.datasource.url' in value
 ${spring.datasource.url}""