feat: Migrate Astro to root - Replace Next.js completely

- Removed Next.js project (src, app, components, etc.)
- Moved Astro from dealplustech-astro/ to root
- Updated Dockerfile for Astro root deployment
- All PDPA compliance features preserved:
  * Cookie consent banner
  * Consent logging API with SQLite
  * Admin dashboard (/admin/consent-logs)
  * Privacy Policy (Thai, PDPA-compliant)
  * Terms & Conditions (Thai)
- 15 pages: homepage, 6 products, 3 blog posts, legal pages, admin
- Build: 660ms, all pages generated successfully

Dockerfile

@@ -3,16 +3,15 @@ FROM node:20-alpine AS builder
 
 WORKDIR /app
 
-# Copy package files
 COPY package*.json ./
-
-# Install dependencies
 RUN npm ci
 
-# Copy source code
 COPY . .
 
-# Build Next.js project
+# Create data directory for database
+RUN mkdir -p data
+
+# Build Astro
 RUN npm run build
 
 # Production Stage
@@ -20,23 +19,26 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-# Copy package files
-COPY package*.json ./
+# Install SQLite runtime
+RUN apk add --no-cache sqlite-libs
 
-# Install production dependencies only
+COPY package*.json ./
 RUN npm ci --production
 
-# Copy built Next.js app
-COPY --from=builder /app/.next/standalone ./
-COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/dist ./dist
 COPY --from=builder /app/public ./public
+COPY --from=builder /app/astro.config.mjs ./
+COPY --from=builder /app/data ./data
 
-# Expose port
 EXPOSE 4321
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
   CMD node -e "require('http').get('http://localhost:4321', (r) => {process.exit(r.statusCode === 200 ? 0 : 1)})"
 
-# Start Next.js server
-CMD ["node", "server.js"]
+ENV NODE_ENV=production
+ENV ASTRO_DB_REMOTE_URL=file:/app/data/consent.db
+ENV PORT=4321
+
+# Start Astro preview server
+CMD ["npm", "run", "preview", "--", "--host", "0.0.0.0", "--port", "4321"]