nginx.conf

upstream backend {
  server 192.168.33.102:8065;
  server 192.168.33.103:8065;
}

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

  location ~ /api/v[0-9]+/(users/)?websocket$ {
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            client_max_body_size 50M;
            proxy_set_header Host $http_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_set_header X-Frame-Options SAMEORIGIN;
            proxy_buffers 256 16k;
            proxy_buffer_size 16k;
            proxy_read_timeout 600s;
            proxy_pass http://backend;
      }

      location / {
            client_max_body_size 50M;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $http_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_set_header X-Frame-Options SAMEORIGIN;
            proxy_pass http://backend;
      }

}