[erp5] don't use caucase generated certificate for now
The certificates generated by caucase are not supported by Caddy (see https://www.erp5.com/project_section/vifib/forum/Problem-with-caddy-frontend-and-caucase-0.95-issued-certificate-UNinzubDv0)
The certificates generated by caucase are not supported by Caddy (see https://www.erp5.com/project_section/vifib/forum/Problem-with-caddy-frontend-and-caucase-0.95-issued-certificate-UNinzubDv0)