how to change confi parameter ie minFreeSpace in container splunk ansible entrypoint,sh.

Generally for server based configurations changes for server such as minFreeSpace can be done in /opt/splunk/etc/system/local/server.conf. How to do this 1 simple change when it is built by ansible and is stateless. meaning it will get wiped out again. even doing a DockerFile copy server.conf to /opt/splunk/etc/system/local/server.conf is wiped out by ansible command in entrypoint.sh