certamen/nginx.conf at main · nikolay-e/certamen · GitHub

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# Nginx configuration for Certamen frontend
# Serves React SPA and proxies API/WebSocket to backend

upstream backend {
    server backend:8765;
}

# Rate limiting zones
limit_req_zone $binary_remote_addr zone=api_limit:10m rate=10r/s;
limit_req_zone $binary_remote_addr zone=ws_limit:10m rate=5r/s;

server {
    listen 80;
    server_name _;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/javascript application/xml+rss application/json;

    # Client body size limit
    client_max_body_size 10M;

    # Health check endpoint (for Docker healthcheck)
    location /health {
        access_log off;
        return 200 "healthy\n";
        default_type text/plain;
    }

    # WebSocket endpoint (proxy to backend)
    location /ws {
        proxy_pass http://backend;
        proxy_http_version 1.1;

        # WebSocket upgrade headers
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";

        # Standard 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;

        # WebSocket timeouts (5 minutes for long-running tournaments)
        proxy_read_timeout 300s;
        proxy_send_timeout 300s;
        proxy_connect_timeout 10s;

        # Disable buffering for WebSocket
        proxy_buffering off;

        # Rate limiting
        limit_req zone=ws_limit burst=10 nodelay;
    }

    # API endpoints (proxy to backend)
    location /api/ {
        proxy_pass http://backend;
        proxy_http_version 1.1;

        # Standard 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;

        # API timeouts (2 minutes for execute endpoint)
        proxy_read_timeout 120s;
        proxy_send_timeout 120s;
        proxy_connect_timeout 10s;

        # Rate limiting
        limit_req zone=api_limit burst=20 nodelay;
    }

    # Authentication endpoints (proxy to backend)
    location /auth/ {
        proxy_pass http://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;

        # Stricter rate limiting for auth endpoints
        limit_req zone=api_limit burst=5 nodelay;
    }

    # React SPA - serve static files
    location / {
        root /usr/share/nginx/html;
        try_files $uri $uri/ /index.html;

        # Security headers
        add_header X-Frame-Options "DENY" 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;
    }

    # Assets directory (compiled JS/CSS with long cache)
    location /assets/ {
        root /usr/share/nginx/html;
        expires 1y;
        access_log off;

        # Security + caching headers
        add_header X-Frame-Options "DENY" 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 Cache-Control "public, immutable" always;
    }

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