NGINX Reverse Proxy

site-url.com.conf

upstream your-application {
  server 0.0.0.0:8080 weight=1 fail_timeout=1s;
  server 0.0.0.0:8081 weight=1 fail_timeout=1s;
}

server {
  listen 80;
  server_name site-url.com;

  location / {
    proxy_pass http://your-application;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection 'upgrade';
    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;
    proxy_cache_bypass $http_upgrade;
  }
}