I can't create dockerized couchbase hostname in Spring Boot

Couchbase Server
, ,
1

I’ve a basic spring boot and couchbase app. I want to dockerized it but when I dockerized both of my server(spring + db) I can’t connect couchbase from spring boot. I guess this is caused by localhost

My Couchbase Config on Spring

@Configuration
public class CouchbaseConfiguration extends AbstractCouchbaseConfiguration {
    @Override
    public String getConnectionString() {
        return "couchbase://127.0.0.1";
    }

    @Override
    public String getUserName() {
        return "Administrator";
    }

    @Override
    public String getPassword() {
        return "password";
    }

    @Override
    public String getBucketName() {
        return "default";
    }

    @Override
    protected boolean autoIndexCreation() {
        return true;
    }
}

I now, when we use the dockerized app, don’t use localhost(127.0.0.1) but I can’t react to couchbase with hostname

My Docker-compose file

version: '3.0'
services:
  couchbase:
    build: ./couchbase
    container_name: couchbase
    volumes:
      - ~/couchbase/node1:/opt/couchbase/var
    ports:
      - 8091:8091
      - 8092:8092
      - 8093:8093
      - 11210:11210

  todo_server:
    build: ./todo-backend
    container_name: todo_server
    depends_on:
      - couchbase
    ports:
      - 8080:8080

How can I to couchbase with http://db:8091 ?