nginx.conf

worker_processes auto;
error_log /var/log/nginx/error.log warn;
pid /var/run/nginx.pid;

events {
    worker_connections 1024;
}

http {
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                    '$status $body_bytes_sent "$http_referer" '
                    '"$http_user_agent"';
    access_log /var/log/nginx/access.log main;

    sendfile on;
    keepalive_timeout 65;
    client_max_body_size 10m;

    # Gzip compression
    gzip on;
    gzip_types text/plain application/json application/javascript text/css;
    gzip_min_length 256;

    # Rate limiting
    limit_req_zone $binary_remote_addr zone=api:10m rate=30r/s;

    # Upstream
    upstream quantai {
        server api:8000;
    }

    server {
        listen 80;
        server_name _;

        # Redirect HTTP to HTTPS in production
        # Uncomment when certs are configured:
        # return 301 https://$host$request_uri;

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

        # API rate limiting
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            proxy_pass http://quantai;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        }

        # WebSocket support
        location /ws/ {
            proxy_pass http://quantai;
            proxy_http_version 1.1;
            proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
            proxy_set_header Host $host;
            proxy_read_timeout 86400;
        }

        # Prometheus metrics — restrict to internal
        location /api/metrics/prometheus {
            allow 10.0.0.0/8;
            allow 172.16.0.0/12;
            allow 192.168.0.0/16;
            deny all;
            proxy_pass http://quantai;
        }

        # Health check — no rate limit
        location /api/health {
            proxy_pass http://quantai;
        }
    }

    # Uncomment for HTTPS:
    # server {
    #     listen 443 ssl;
    #     server_name your-domain.com;
    #     ssl_certificate /etc/nginx/certs/fullchain.pem;
    #     ssl_certificate_key /etc/nginx/certs/privkey.pem;
    #     ssl_protocols TLSv1.2 TLSv1.3;
    #     ssl_ciphers HIGH:!aNULL:!MD5;
    #     # ... same location blocks as above
    # }
}