Update server software
Hi. I've noticed that server software is outdated, even when there are security advisories related to new releases. For example:
Nginx. Latest version: 1.17.8. Installed: 1.14.2 (released 12/4/2018 and EOL)
Varnish. Latest version: 6.3.2. Installed: 4.0.2 (released 10/8/2014 and EOL)
Apache. Latest version: 2.4.41. Installed: 2.4.10 (released 7/15/2014)
Only PHP is nearly up to date, since you're only missing recent minor release (7.3.15, launched three days ago).
Please upgrade, since it is one of the main chores of a managed hosting. Thank you.