My FQDN certificate has been auto-renewed GoDaddy. According to https://www.3cx.com/docs/renewing-ssl-certificate/ I need to replace the .pem files and restart the NGINX service. I downloaded the cert from GoDaddy using "Other" server type however I only see the standard .crt files. How do I generate the .pem files to replace the current files? Seems there is another step involved that I'm missing.