Pages: https certificate expiry notifications/display
I think it would be a good feature to notify GitLab pages users when their domain is about to expire. A domain certificate that expires soon or expired already should be made visible in the domain list. At the moment it is a biot confusing that a verified but expired domain has a green status icon:
- Send out e-mail notifications: 30 days, 20 days, 10 days before and on the expiry date. Maybe a monthly reminder of all expired domains.
- The certificate status should be shown in the UI. For domain verification we use the nice status icon and a nice warning row. We could use the same icon for HTTPS status and add such nice rows for expired and about to expire domains.