A Kimai 2 plugin, which adds some security related functionality (like adding a Referrer-policy header to all responses).
First clone it to your Kimai installation plugins
directory:
cd /kimai/var/plugins/
git clone https://github.com/digipolisgent/kimai_plugin_security.git KimaiSecurityBundle
And then rebuild the cache:
cd /kimai/
bin/console cache:clear
bin/console cache:warmup
You could also download it as zip and upload the directory via FTP:
/kimai/var/plugins/
├── KimaiSecurityBundle
│ ├── KimaiSecurityBundle.php
| └ ... more files and directories follow here ...