Setting up Certbot for use with nginx port 80 conflict

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What I don't like of your setup is that you used one server block for each FQDN on port 80. For example, I did the same redirect on multiple subdomains like this:

server {
        listen 80;
        listen [::]:80;
        server_name .example.com; 
        # simplified form -- see http://nginx.org/en/docs/http/server_names.html

        location /.well-known/acme-challenge/ {
                root /var/www/acme;
        }

        location / {
                return 301 https://$host$request_uri;
        }
}

And I only have this block on port 80. Several on 443.

A wanted side effect, all subdomains have the same webroot as far as Let's Encrypt is concerned. On port 443, they serve different things.

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