nginx.conf

# ============================
# Nginx Configuration - ConstructERP Frontend
# Servidor estático + Reverse Proxy al Backend
# ============================

server {
    listen 80;
    server_name localhost;

    # Raíz de archivos estáticos (Vite build output)
    root /usr/share/nginx/html;
    index index.html;

    # ─── Cabeceras de Seguridad (equivalente a vercel.json) ───
    add_header X-Frame-Options "DENY" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Permissions-Policy "camera=(), microphone=(), geolocation=()" always;
    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline' https://fonts.googleapis.com; font-src 'self' https://fonts.gstatic.com; img-src 'self' data: https:; frame-src 'self' https://sketchfab.com; connect-src 'self'; object-src 'none'; base-uri 'self';" always;

    # ─── Reverse Proxy: /api → Backend Node.js ───
    location /api/ {
        proxy_pass http://backend:3000/api/;
        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;

        # Soporte para cookies HttpOnly (CORS interno)
        proxy_set_header Cookie $http_cookie;
        proxy_pass_header Set-Cookie;
    }

    # ─── Reverse Proxy: /docs → Swagger UI ───
    location /docs {
        proxy_pass http://backend:3000/docs;
        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;
    }

    # ─── SPA Fallback: React Router ───
    location / {
        try_files $uri $uri/ /index.html;
    }

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

    # ─── Caché de Archivos Estáticos ───
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        access_log off;
    }
}