Websockets

Follow instructions to install certbox/letsencrypt to get your certificate.

How To Secure Nginx with Let's Encrypt on Ubuntu 18.04 | DigitalOcean

Configure NGINX Websocket

upstream websockets {
  server localhost:8090;
}

server {
        
        server_name mainnet-lb.quantachain.io;
        server_name _;
        
        
        location / {
                access_log on;
                proxy_pass http://websockets;
                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header Host $host;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection "upgrade";
                    proxy_read_timeout 86400;
        }
        
        
        listen 80;
        listen [::]:443 ssl ipv6only=on; # managed by Certbot
        listen 443 ssl; # managed by Certbot
        ssl_certificate /etc/letsencrypt/live/mainnet-lb.quantachain.io/fullchain.pem; # managed by Certbot
        ssl_certificate_key /etc/letsencrypt/live/mainnet-lb.quantachain.io/privkey.pem; # managed by Certbot
        include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
        ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}