How do I set up the database and get the JNDI address?

Hello friends, I have a question
How do I set up the database and get the JNDI address?

quarkus.properties in conf folder

quarkus.datasource.ext.db-kind=postgresql
quarkus.datasource.ext.username=test
quarkus.datasource.ext.password=test
quarkus.datasource.ext.jdbc.url=jdbc:postgresql://172.0.0.1:5432/mysys
quarkus.datasource.ext.jdbc.max-size=16

What is the JNDI address in quarkus?