Domain Recipes: clarify allowed tlds for recipe 1 and other suggestions

[maxime-memtell]

General Description

As a reader of the "Domain Recipes" page I would like to have more clarity as to which tlds are ok for recipe 1 in order to have 0 doubt on whether I can buy a domain on Route 53 and get started.

In more details

As I was following the quick start guide and went through the domain recipes, in particular recipe 1, I found the documentation text to be just a tiny bit unclear on the fact that ".com" and ".link" are placeholders, and can be replaced by other top-level domains (tld), say ".io" or ".co", and since this step costs money, it could/should be improved.

Small hints that overall created my doubt:

• ".link" is a very specific tld and is not necessarily a short one for what is supposed to be a short link
• There is a bit on second-level domains and their specificity
• Nowhere is it explicitly said that ".com" and ".link" are placeholders

I eventually went forward and can clarify that it is indeed perfectly ok to have a ".co" instead of ".com" for instance, while using Recipe 1.

Potential solution:

Currently, it writes:

Known bug + fix: Using a second level domain (.co.uk, .com.fr, etc)? Use Recipe 3.

Instead it could write:

".com" and ".link" can be replaced by other top-level domains at your convenience, eg. ".co", ".io" etc.
Known bug + fix: Using a second level domain (.co.uk, .com.fr, etc)? Use Recipe 3.

Aside from this, I also found:

• It was hard to guess what the short-link link does exactly. Again, the ".link" example threw me off track for a sec since it's not that short and actually longer in the example ("myhub.com" vs "myhub.link"). An illustration (screenshot), and/or a reference to the Mozilla example could be helpful ("hubs.mozilla.com" vs "hub.link")
• Someone on discord warning me that which tld to chose is also important for email server spam filters. In particular that ".space" was an issue for them
• There are leftovers from drafts/todo in the doc? For instance

mysite.com set up on on Route 53 (?)

What is the (?) doing here?

• While following Recipe 1 it was not clear when I should instantiate on a subdomain

I would be happy to submit a quick PR if someone doubles-check my language prior to it since I am not a native English speaker.

Let me know what I can clarify, in the meantime, my domains got approved, the transfer lock got disabled and my stack got successfully deployed 🎉 😄