nginx.conf

# Nginx Configuration for GameArena (Production)
# Place this file at: /etc/nginx/nginx.conf or include it from main config

events {
    worker_connections 2048;
}

http {
    # Basic Settings
    sendfile on;
    tcp_nopush on;
    tcp_nodelay on;
    keepalive_timeout 65;
    types_hash_max_size 2048;
    
    include /etc/nginx/mime.types;
    default_type application/octet-stream;

    # Logging
    access_log /var/log/nginx/access.log;
    error_log /var/log/nginx/error.log;

    # Gzip Compression
    gzip on;
    gzip_vary on;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types text/plain text/css text/xml text/javascript 
               application/json application/javascript application/xml+rss;

    # Rate Limiting
    limit_req_zone $binary_remote_addr zone=api:10m rate=60r/m;
    limit_req_zone $binary_remote_addr zone=login:10m rate=5r/m;

    # Upstream Flask Backend
    upstream gamearena_backend {
        server gamearena:5000;
        keepalive 32;
    }

    # HTTP to HTTPS Redirect
    server {
        listen 80;
        listen [::]:80;
        server_name yourdomain.com www.yourdomain.com;

        # ACME Challenge for Let's Encrypt
        location /.well-known/acme-challenge/ {
            root /var/www/certbot;
        }

        # Redirect all other traffic to HTTPS
        location / {
            return 301 https://$server_name$request_uri;
        }
    }

    # HTTPS Server
    server {
        listen 443 ssl http2;
        listen [::]:443 ssl http2;
        server_name yourdomain.com www.yourdomain.com;

        # SSL Configuration
        ssl_certificate /etc/nginx/ssl/cert.pem;
        ssl_certificate_key /etc/nginx/ssl/key.pem;
        
        # SSL Security
        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';
        ssl_prefer_server_ciphers off;
        ssl_session_timeout 1d;
        ssl_session_cache shared:SSL:50m;
        ssl_session_tickets off;
        
        # OCSP Stapling
        ssl_stapling on;
        ssl_stapling_verify on;
        resolver 8.8.8.8 8.8.4.4 valid=300s;
        resolver_timeout 5s;

        # Security Headers
        add_header Strict-Transport-Security "max-age=63072000; includeSubDomains; preload" always;
        add_header X-Frame-Options "SAMEORIGIN" always;
        add_header X-Content-Type-Options "nosniff" always;
        add_header X-XSS-Protection "1; mode=block" always;
        add_header Referrer-Policy "strict-origin-when-cross-origin" always;
        add_header Content-Security-Policy "default-src 'self' 'unsafe-inline' 'unsafe-eval'; img-src 'self' data: https:; font-src 'self' data:;" always;

        # Max Body Size (pour upload de bots)
        client_max_body_size 10M;

        # Root Location - Proxy to Flask
        location / {
            proxy_pass http://gamearena_backend;
            proxy_http_version 1.1;
            
            # Proxy Headers
            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;
            proxy_set_header X-Forwarded-Host $host;
            proxy_set_header X-Forwarded-Port $server_port;
            
            # Timeouts
            proxy_connect_timeout 60s;
            proxy_send_timeout 60s;
            proxy_read_timeout 60s;
            
            # Buffering
            proxy_buffering on;
            proxy_buffer_size 4k;
            proxy_buffers 8 4k;
            proxy_busy_buffers_size 8k;
        }

        # API Routes with Rate Limiting
        location /api/ {
            limit_req zone=api burst=20 nodelay;
            
            proxy_pass http://gamearena_backend;
            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;
            
            # Longer timeout for game execution
            proxy_connect_timeout 120s;
            proxy_send_timeout 120s;
            proxy_read_timeout 120s;
        }

        # Login/Register Routes with Stricter Rate Limiting
        location ~ ^/api/auth/(login|register) {
            limit_req zone=login burst=3 nodelay;
            
            proxy_pass http://gamearena_backend;
            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;
        }

        # Static Files (avec cache long)
        location /static/ {
            proxy_pass http://gamearena_backend;
            
            # Cache aggressif
            expires 1y;
            add_header Cache-Control "public, immutable";
        }

        # WebSocket Support (si implémenté plus tard)
        location /ws {
            proxy_pass http://gamearena_backend;
            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_read_timeout 86400;
        }

        # Health Check (pas de rate limit)
        location /health {
            proxy_pass http://gamearena_backend/api/referees;
            access_log off;
        }

        # Deny access to sensitive files
        location ~ /\. {
            deny all;
            access_log off;
            log_not_found off;
        }

        location ~ /(\.env|\.git|docker-compose\.yml|Dockerfile) {
            deny all;
            access_log off;
            log_not_found off;
        }
    }
}