server {
    listen 80 default_server;
    listen [::]:80 default_server;
    server_name 218.93.190.75;

    client_max_body_size 12m;

    location ^~ /.well-known/acme-challenge/ {
        root /var/www/letsencrypt;
        default_type text/plain;
    }

    location / {
        proxy_pass http://127.0.0.1:18088;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto http;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_read_timeout 120s;
    }
}