proxy-nginx/nginx-config/https-prepare-to-cache/sites-available/http-for-letsencrypt.conf

server {
    listen 80 default_server;
    server_name _;
    server_tokens off;
    
    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }
    
    location / {
        return 301 https://$host$request_uri;
    }
}