Digital Ocean Droplet 的 DNS Settings - Root Domain?

[JammyDodger]

如果清除浏览器缓存不起作用，可能是因为您需要一个 letsencrypt 证书来覆盖非 www 版本。

您可以在此主题中找到有关如何执行此操作的一些信息：

Set up Let’s Encrypt with multiple domains / redirects

NOTE: @pfaffman says: This page needs to be cleaned up. There is now a new ENV setting that will let you add more hostnames. In your app.yml under your DISCOURSE_HOSTNAME line (it can go many places but that one makes sense), add DISCOURSE_HOSTNAME_ALIASES: domain.com,other.domain.com and early reports suggest that you’ll get valid certs for those domains and that accessing https://domain.com will properly redirect you to your DISCOURSE_HOSTNAME without a certificate error. If you do that an…

或者，我认为您可以使用类似以下内容代替：

Non www to www without certificate error

The easiest way is to use www.forcewww.com for that. (Disclaimer: that’s my own service)