メインドメインにインストールできません。どうしたのでしょうか？

[awesomerobot (Kris)]

Have you seen this guide? The short version is that not all DNS providers can host Discourse on an apex domain.

Configure your hosted Discourse site to run at the root or apex domain (e.g. example.com)

Most hosted discourse instances are on a subdomain: forum.example.com talk.example.com www.example.com This is our general recommendation in almost all cases, and it works great. However, if you wish to use a root domain or apex domain for your hosted discourse, like so example.com this turns out to be surprisingly difficult in a hosting scenario, due to the vagaries of how DNS works. It is possible, however, you must use a DNS provider that specifically supports it! DNS pro…