AWS Elastic Beanstalk NodeJS和日志

I want to migrate my NodeJS project from single EC2 to ElasticBeanstalk. In my current code I use the dependency log4js which create a log file on the filesystem. On EC2 this works create but what is the best way in ElasticBeanstalk to log something? If I download the generated logs from ElasticBeanstalk my custom log file from log4js isn't present.I want to migrate my NodeJS project from single