How to specify the path to the log file in a Java application on a Linux server?

Question

Java

I am deploying a JAR on a Linux server.
I want to store all log files in the /var/log/ directory, which is located in root
in the application properties file

logging.level.org.springframework.web=debug
logging.level.org.hibernate=error
logging.file.name=/var/log/myproj/myproj.log

but the log file is created in the JAR directory, how to specify it correctly?