copy to {{magento_root}}/app/code/
php bin/magento module:enable JKrawczyk_EventLogger
php bin/magento setup:upgrade
php bin/magento setup:di:compile
Event log is created in {{magento_root}}/var/log/event_logger.log
Please use it for debug only - be sure to disable it afterwards.
Magento event logs consume a lot of disk space.