The PostgreSQL Audit Extension (or pgaudit) provides detailed session and/or object
audit logging via the standard logging facility provided by PostgreSQL.

Bind-mount this directory under /opt/app-root/src in the container, and all the
*.conf files from postgresql-cfg/ files will be included to postgresql.conf.

This config file enables the pgaudit extensions that is available in the container
image, but needs to be enabled.

More about pgaudit extension at https://www.pgaudit.org.