# Rewrite requests for domains to their corresponding www
# It is not necessary to configure the redirect for SSL
# because we expect the browser to try HTTP if HTTPS fails
server {
    listen 80;
    server_name ~^(?!www\.)(?<domain>.+)$;

    return 301 https://www.$domain$request_uri;
}

# Serve general purpose HTML if no server matches
# Usually this just shows a message that NGINX has been
# configured successfully
server {
    listen 80 default_server;
    listen [::]:80 default_server;

    server_name _;
    root /var/www/html;
    index index.html index.htm welcome.html welcome.htm;

    location / {
        try_files $uri $uri/ =404;
    }
}