NGINX alias for mapping Let's Encrypt "webroot" challenge to one directory

letsencrypt.conf

# Just an example, but basically you'd save this under something like `/etc/nginx/letsencrypt.conf`
# Then inside your configuration for your website inside the `server` block, you'd also do: `include letsencrypt.conf`
# Reload/restart NGINX config, then request a certificate and point the webroot to `/var/www/html` (or whatever else you changed it to, if you did).
location /.well-known/acme-challenge {
    # Change `/var/www/html` to something that makes sense for your configuration.
    # Just make sure to use the correct directory when using webroot challenge, if you do end up changing it.
    alias /var/www/html/.well-known/acme-challenge;
}