Add zabbix agent and simple CLI to configure it.
```
set service zabbix-agent server x.x.x.x
set service zabbix-agent server-active x.x.x.x
```
https://www.zabbix.com/documentation/current/en/manual/appendix/config/zabbix_agent2
https://www.initmax.cz/wp-content/uploads/2022/05/zabbix-agent-2-6.0.pdf