Here you go - please notice that you need to alter the service file:
Cfr. How to disable saving Kibana logs to /var/log/kibana
#https://discuss.elastic.co/t/how-to-disable-saving-kibana-logs-to-var-log-kibana/296447
#https://discuss.elastic.co/t/logging-configuration-issues-in-kibana-7-16/295517
# REQUIRED: disable hardcoded logging in /etc/systemd/system/kibana.service
logging:
appenders:
file:
type: file
fileName: /<path>/log/kibana/kibana.log
layout:
type: pattern
rolling-file:
type: rolling-file
fileName: /<path>/log/kibana/kibana.log
policy:
type: size-limit
size: 50mb
strategy:
type: numeric
pattern: '-%i'
max: 7
layout:
type: pattern
root:
appenders: [default,rolling-file]