# Replace chat.example.com with your actual domain before installing.
# HTTP certificate bootstrap only; the application is not exposed here.
server {
    listen 80;
    listen [::]:80;
    server_name chat.example.com;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
        try_files $uri =404;
    }

    location / {
        return 404;
    }
}