edit a secret:
agenix -e nginx.env.age
- redirect all http traffic to https in traefik
- make nextcloud aware that's behind tls
- fix OpenID connect, redirect URI is https.
- integrate: https://github.com/favonia/cloudflare-ddns
- even better: https://github.com/kubernetes-sigs/external-dns