user  nginx;
worker_processes  1;

events {
    worker_connections  1024;
}

http {
    default_type  application/octet-stream;

    server {
        listen 80;

        # Define MIME type
        types {
            text/html html htm shtml;
        }

        location / {
            # Use the placeholders for the proxy pass (ensure these are properly substituted)
            proxy_pass http://backend:port;  # Replace with actual backend address and port
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection $connection_upgrade;  # This can handle both Upgrade and close
            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 Accept-Encoding "";
            proxy_buffering off;

            # Error handling (example)
            error_page 502 /502.html;
            location = /502.html {
                root  /usr/share/nginx/html;
                internal;
            }
        }

        # Custom location for WebSocket if needed
        # location /ws {
        #     proxy_pass http://backend:port;
        #     proxy_http_version 1.1;
        #     proxy_set_header Upgrade $http_upgrade;
        #     proxy_set_header Connection "Upgrade";
        #     # Other necessary headers...
        # }
    }
}