Zabbix in containers: https://www.zabbix.com/documentation/current/en/manual/installation/containers
docker compose up -d
Zabbix web interface: https://127.0.0.1:8080/ Error "can not find a configuration" is OK, wait about a minute.
Default user and password: Admin:zabbix
Add agent: zabbix-agent 10050
Install openssl in agent:
docker compose exec -u 0 zabbix-agent sh -c 'apk add openssl curl'
Now you can debug templates.