Create a nginx_certbot_site resource to remove duplication

It creates a folder, the nginx vhost for certbot and HTTP redirects, and
also runs certbot and recreates the nginx vhost that includes the TLS
cert

site-cookbooks/kosmos-mastodon/templates/default/nginx_conf_mastodon.erb

@@ -3,18 +3,6 @@ map $http_upgrade $connection_upgrade {
   ''      close;
 }
 
-server {
-  listen 80;
-  listen [::]:80;
-  server_name <%= @server_name %>;
-
-  access_log "/var/log/nginx/mastodon.access.log";
-  error_log "/var/log/nginx/mastodon.error.log";
-
-  location /.well-known { root "/var/www/mastodon"; }
-  location / { return 301 https://$host$request_uri; }
-}
-
 server {
   listen 443 ssl http2;
   listen [::]:443 ssl http2;