feat: Initial commit - Mexus App

Sistema de Gestión de Obras de Construcción completo con:
- Dashboard con KPIs y gráficos
- Módulo de obras con fases y tareas
- Control financiero (gastos, presupuestos)
- Gestión de recursos (personal, subcontratistas)
- Inventario de materiales con alertas de stock
- Reportes con exportación CSV
- Autenticación con roles (NextAuth.js v5)
- API REST completa
- Documentación de API y base de datos
- Configuración Docker para despliegue

Stack: Next.js 14+, TypeScript, Tailwind CSS, Prisma, PostgreSQL

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

nginx.conf

@@ -0,0 +1,63 @@
+events {
+    worker_connections 1024;
+}
+
+http {
+    upstream nextjs {
+        server app:3000;
+    }
+
+    # Rate limiting
+    limit_req_zone $binary_remote_addr zone=api:10m rate=10r/s;
+
+    server {
+        listen 80;
+        server_name _;
+
+        # Security headers
+        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;
+
+        # Gzip compression
+        gzip on;
+        gzip_vary on;
+        gzip_min_length 1024;
+        gzip_proxied any;
+        gzip_types text/plain text/css text/xml text/javascript application/javascript application/json application/xml;
+
+        location / {
+            proxy_pass http://nextjs;
+            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_set_header X-Forwarded-Proto $scheme;
+            proxy_cache_bypass $http_upgrade;
+        }
+
+        # Rate limit API endpoints
+        location /api/ {
+            limit_req zone=api burst=20 nodelay;
+            proxy_pass http://nextjs;
+            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_set_header X-Forwarded-Proto $scheme;
+            proxy_cache_bypass $http_upgrade;
+        }
+
+        # Static files caching
+        location /_next/static {
+            proxy_pass http://nextjs;
+            proxy_cache_valid 60m;
+            add_header Cache-Control "public, max-age=3600, immutable";
+        }
+    }
+}