nginx.conf

events {
    worker_connections 1024;
}

http {
    upstream shurull_api {
        server 127.0.0.1:5000;
    }

    # HTTP redirect to HTTPS
    server {
        listen 80;
        server_name shurull-api.com;
        return 301 https://$server_name$request_uri;
    }

    # Main HTTPS server
    server {
        listen 443 ssl;
        server_name shurull-api.com;

        ssl_certificate /etc/letsencrypt/live/shurull-api.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/shurull-api.com/privkey.pem;
        
        # SSL configuration
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers off;
        
        # HSTS
        add_header Strict-Transport-Security "max-age=63072000" always;

        location / {
            proxy_pass http://shurull_api;
            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;
        }
    }

    # Dynamic upstream for deployed APIs with SSL
    server {
        listen 443 ssl;
        server_name ~^(?<subdomain>.+)\.shurull-api\.com$;

        ssl_certificate /etc/letsencrypt/live/shurull-api.com/fullchain.pem;
        ssl_certificate_key /etc/letsencrypt/live/shurull-api.com/privkey.pem;
        
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
        ssl_prefer_server_ciphers off;

        location / {
            proxy_pass http://127.0.0.1:$port;
            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;
        }
    }
}