🎓 Initial commit: Math2 Platform - Plataforma de Álgebra Lineal PRO

✨ Características:
- 45 ejercicios universitarios (Basic → Advanced)
- Renderizado LaTeX profesional
- IA generativa (Z.ai/DashScope)
- Docker 9 servicios
- Tests 123/123 pasando
- Seguridad enterprise (JWT, XSS, Rate limiting)

🐳 Infraestructura:
- Next.js 14 + Node.js 20
- PostgreSQL 15 + Redis 7
- Docker Compose completo
- Nginx + SSL ready

📚 Documentación:
- 5 informes técnicos completos
- README profesional
- Scripts de deployment automatizados

Estado: Producción lista ✅

docker/Dockerfile.frontend

@@ -0,0 +1,87 @@
+# ==================================================
+# MULTI-STAGE DOCKERFILE - FRONTEND (Next.js 14)
+# Next.js App Router + TypeScript + TailwindCSS
+# ==================================================
+
+# --------------------------------------------------
+# STAGE 1: Dependencies
+# --------------------------------------------------
+FROM node:20-alpine AS deps
+WORKDIR /app
+
+# Install build dependencies for native modules
+RUN apk add --no-cache libc6-compat
+
+# Copy package files
+COPY frontend/package*.json ./
+
+# Install dependencies
+RUN npm ci && \
+    npm cache clean --force
+
+# --------------------------------------------------
+# STAGE 2: Builder
+# --------------------------------------------------
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+# Copy dependencies from deps stage
+COPY --from=deps /app/node_modules ./node_modules
+COPY frontend/package*.json ./
+
+# Copy all source files
+COPY frontend/ ./
+
+# Set environment for build
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV NODE_ENV=production
+
+# Build Next.js application
+RUN npm run build
+
+# --------------------------------------------------
+# STAGE 3: Production Runner (Standalone Mode)
+# --------------------------------------------------
+FROM node:20-alpine AS runner
+WORKDIR /app
+
+# Install runtime dependencies
+RUN apk add --no-cache curl wget
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && \
+    adduser -S nextjs -u 1001
+
+# Set environment
+ENV NODE_ENV=production
+ENV NEXT_TELEMETRY_DISABLED=1
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+
+# Copy necessary files from builder
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/package*.json ./
+
+# Copy standalone output
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+# Switch to non-root user
+USER nextjs
+
+# Expose port
+EXPOSE 3000
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
+    CMD wget --no-verbose --tries=1 --spider http://localhost:3000 || exit 1
+
+# Start Next.js server
+CMD ["node", "server.js"]
+
+# --------------------------------------------------
+# METADATA
+# --------------------------------------------------
+LABEL maintainer="math-platform-builders"
+LABEL description="Math Platform Frontend (Next.js)"
+LABEL version="1.0.0"