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**Features and Improvements**
- Add the following bootstrap commands:
- ``acorebs run_log_to_ec2_tag_cron_job``
- ``acorebs stop_log_to_ec2_tag_cron_job``
- ``acorebs run_measure_worldserver_cron_job``
- ``acorebs stop_measure_worldserver_cron_job``
- No longer run ``acorebs run_check_server_status_cron_job`` in bootstrap and cloud-init, now we run ``acorebs run_log_to_ec2_tag_cron_job`` and ``acorebs run_measure_worldserver_cron_job`` instead. This gives us better server monitoring visibility, better performance, and lower cost.
**Minor Improvements**
- Improve document.