nginx.conf

events {
  worker_connections 1500;
}

http {
  access_log off;
  sendfile   on;
  error_log /var/log/nginx/error.log;

  upstream api {
    server api1:8080;
    server api2:8080;
    keepalive 100;
  }

  gzip on;
  gzip_comp_level 5;
  gzip_min_length 256;
  gzip_types application/json;

  server {
    listen 9999 backlog=750;

    location / {
      proxy_pass http://api;
      proxy_http_version 1.1;
      proxy_set_header Connection "";
      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 $scheme;
    }

    # Adjust buffer sizes for better performance
    proxy_buffer_size 128k;
    proxy_buffers 4 256k;
    proxy_busy_buffers_size 256k;
    proxy_max_temp_file_size 0;
    proxy_temp_file_write_size 256k;
  }
}