items on the Servers listing page should be links

[joachim-n]

On https://joinmastodon.org/servers, the only part of each item that is a link is the link to 'Apply for an account'.

But before you do that, it's useful to explore the server, the other accounts there, its info page, and so on.

The name of the serve & its illustration should both be links to the server's main page.