1. Adjust the time amongst the server in your system
ntpdate time.apple.com
2. Check and monitor your disk space
Your service may stop after one year from the beginning of your service release date because the log files occupies a server disk space.
Use logrotate to truncate the log files (even if you are practicing that, the logs will overflow at the server).
Monitor the remaining disk space by using df command.
df -h
3. Use the same version of your development and runtime systems environment in your team members.
Use https://semver.org
OS (Linux disribution and the version)
Programming language version (Especially Python 2.7.x and 3.x)
Framework version
VM version (Java VM version, etc)
Use Jenkins to test your systems and software in your team if possible, then release it.
4. Check the expiration of SSL certificate
After one or three year later, the certificate needs to be updated however no one knows since that team member is leaving.