nginx.conf

map $http_upgrade $connection_upgrade {
    default upgrade;
    '' close;
}

server {
    listen 80;
    server_name letscube.net www.letscube.net;

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

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

server {
    listen 443 ssl http2;
    server_name letscube.net www.letscube.net;

    ssl_certificate /etc/letsencrypt/live/www.letscube.net/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/www.letscube.net/privkey.pem;

    proxy_http_version 1.1;
    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 = /health/socket {
        proxy_pass http://socket:9000/health/socket;
    }

    location /socket.io/ {
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection $connection_upgrade;
        proxy_buffering off;
        proxy_pass http://socket:9000;
    }

    location / {
        proxy_pass http://api:8080;
    }
}