If one follows the steps for setting up DNS over HTTPS with the cloudflared daemon: https://developers.cloudflare.com/126.96.36.199/dns-over-https/cloudflared-proxy/
INFO Failed to copy user configuration. Before running the service, ensure that /etc/cloudflared contains two files, cert.pem and config.yml error="open /usr/local/etc/cloudflared/cert.pem: no such file or directory"
Then it will error out on missing cert.pem. The page says nothing about needing to obtain an Argo tunnel certificate, or how to login and do so (only the config.yml)… Well, is that required? You should probably add a note.
This same issue was also noted in Example YAML for cloudflared 188.8.131.52 service?