Server naming scheme

まだ誰も着手していません。

We don't have many servers (nominally 1 if load allows it), but if we need to provision a bigger one, and destroy the old, it'd be good to have a reasonable naming scheme. I've found [this blog post](https://mnx.io/blog/a-proper-server-naming-scheme/) which seems reasonable. It is for a far higher count of servers than we need, so we can skip a few items, but I think something like the following:
* Servers are named `.matplotlib.org` in A records.
* Servers get a functional CNAME alias (e.g., `web01.matplotlib.org`). Since we have few servers, I suggest ignoring the geographical and environmental prefixes given in the post.
* `matplotlib.org` is a CNAME to the functional CNAME of a server.

There are several suggested word pools, but as it's fairly neutral, easy-to-remember, and not-too-difficult-to-spell, I'm going to suggest that we use [Planets in our Solar System](https://namingschemes.com/Solar_System) as ``.

Issue には、ファイル、テスト、エントリーポイントが特定されていません。まず、リンクされている命名スキームの記事と現在の DNS/サーバー構成を確認し、その後、提案する A records、機能用の CNAME、matplotlib.org のエイリアスを定義して、命名規則と移行計画を明確にしてください。

索引モデルが issue の本文から書いたものです。