Final Git Commit: Setup domain and ssl
If you visit your domain name and open the javascript developer console. You should see the below error.

The page at 'https://algoholic.pro/ws/hi/' was loaded over HTTPS, 
but attempted to connect to the insecure WebSocket endpoint 'ws://algoholic.pro:8000/ws/hi'. 
This request has been blocked; this endpoint must be available over WSS.

This makes sense, we haven't done anything to ensure secure websocket support. Let's do it now. Change the nginx.conf to include a new location /ws/
 

worker_processes 4;

events { worker_connections 1024; }

http {
    sendfile on;
    server_tokens off;

    server {
    listen 80;
    listen [::]:80;
    server_name algoholic.pro;

    location /.well-known/acme-challenge/ {
        root /var/www/certbot;
    }

    location / {
        return 301 https://$host$request_uri;
        }
    }


    server {
        listen 443 ssl;
        server_name algoholic.pro;

        ssl_certificate /etc/nginx/ssl/live/algoholic.pro/fullchain.pem;
        ssl_certificate_key /etc/nginx/ssl/live/algoholic.pro/privkey.pem;

        location / {
            proxy_pass http://web:8000;
            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;
        }

        location /ws/ {
            proxy_pass http://web:8000;
            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;
        }
    }
}

This will handle the WebSocket request to nginx.  Now, we can visit algoholic.pro/room_id/ ad find it working 🐮.

Blunder: I added a redundent line ports: "6379:6379" in redis which exposed our redis to the VM and anyone could ping redis with  telnet 159.89.87.96 6379. To fix it, we need to remove ports and simply add a command to bind redis with network of docker.

  redis:
    image: redis:latest
    command: redis-server --bind 0.0.0.0