Avoid any received URL requests for Nginx on Dokku

00-default-vhost.conf

server {
    listen 80 default_server;
    server_name _;
    access_log off;
    return 410;
}

# To handle HTTPS requests, you can uncomment the following section.
#
# Please note that in order to let this work as expected, you need a valid
# SSL certificate for any domains being served. Browsers will show SSL
# errors in all other cases.
#
# Note that the key and certificate files in the below example need to
# be copied into /etc/nginx/ssl/ folder.
#
server {
    listen 443 ssl;
    server_name _;
    ssl_certificate /etc/nginx/ssl/cert.crt;
    ssl_certificate_key /etc/nginx/ssl/cert.key;
    access_log off;
    return 410;
}

# More details => http://dokku.viewdocs.io/dokku~v0.15.5/configuration/domains/#default-site