feat: Initial landing page for LetsBe Cloud

Static marketing site with:
- Value proposition and feature showcase
- 10 core tools listed with descriptions
- Two pricing tiers (Starter $49/mo, Professional $79/mo)
- Stripe Checkout integration for payments
- Responsive design with Tailwind CSS
- FAQ section and footer

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Dockerfile

@@ -0,0 +1,49 @@
+# Stage 1: Install dependencies
+FROM node:20-alpine AS deps
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci --prefer-offline 2>/dev/null || npm install
+
+# Stage 2: Build the static export
+FROM node:20-alpine AS builder
+WORKDIR /app
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+# Build environment variables (Stripe checkout URLs)
+ARG NEXT_PUBLIC_STRIPE_STARTER_URL
+ARG NEXT_PUBLIC_STRIPE_PRO_URL
+ENV NEXT_PUBLIC_STRIPE_STARTER_URL=$NEXT_PUBLIC_STRIPE_STARTER_URL
+ENV NEXT_PUBLIC_STRIPE_PRO_URL=$NEXT_PUBLIC_STRIPE_PRO_URL
+
+RUN npm run build
+
+# Stage 3: Serve with nginx
+FROM nginx:alpine AS runner
+COPY --from=builder /app/out /usr/share/nginx/html
+
+# Custom nginx config for SPA routing
+RUN printf 'server {\n\
+    listen 80;\n\
+    server_name _;\n\
+    root /usr/share/nginx/html;\n\
+    index index.html;\n\
+\n\
+    location / {\n\
+        try_files $uri $uri.html $uri/ /index.html;\n\
+    }\n\
+\n\
+    # Cache static assets\n\
+    location /_next/static/ {\n\
+        expires 1y;\n\
+        add_header Cache-Control "public, immutable";\n\
+    }\n\
+\n\
+    # Security headers\n\
+    add_header X-Frame-Options "SAMEORIGIN" always;\n\
+    add_header X-Content-Type-Options "nosniff" always;\n\
+    add_header Referrer-Policy "strict-origin-when-cross-origin" always;\n\
+}\n' > /etc/nginx/conf.d/default.conf
+
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]