more restructuring

cfg/amar/ctrl/Dockerfile.frontend

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+# =============================================================================
+# Multi-stage Dockerfile for Next.js Frontend
+# =============================================================================
+# Usage:
+#   Development: docker compose up (mounts source, hot reload)
+#   Production:  docker compose -f docker-compose.yml -f docker-compose.prod.yml up
+
+# =============================================================================
+# Stage 1: Dependencies (cached layer)
+# =============================================================================
+FROM node:18-alpine AS deps
+
+WORKDIR /app
+
+# Copy only package files for dependency installation
+COPY package*.json ./
+
+# Install ALL dependencies (including devDependencies for dev mode)
+RUN npm ci
+
+# =============================================================================
+# Stage 2: Development (hot reload, source mounted)
+# =============================================================================
+FROM node:18-alpine AS development
+
+WORKDIR /app
+
+# Copy dependencies from deps stage
+COPY --from=deps /app/node_modules ./node_modules
+
+# Copy package files (for npm scripts)
+COPY package*.json ./
+
+# Copy config files
+COPY next.config.js postcss.config.js tailwind.config.js tsconfig.json ./
+
+# Note: src/ and public/ are mounted at runtime for hot reload
+# Start dev server
+EXPOSE 3000
+CMD ["npm", "run", "dev"]
+
+# =============================================================================
+# Stage 3: Builder (compile for production)
+# =============================================================================
+FROM node:18-alpine AS builder
+
+WORKDIR /app
+
+# Copy dependencies
+COPY --from=deps /app/node_modules ./node_modules
+
+# Copy all source files
+COPY . .
+
+# Build for production
+RUN npm run build
+
+# =============================================================================
+# Stage 4: Production (optimized, minimal)
+# =============================================================================
+FROM node:18-alpine AS production
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+# Copy only production dependencies
+COPY package*.json ./
+RUN npm ci --only=production && npm cache clean --force
+
+# Copy built application from builder
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/next.config.js ./
+
+EXPOSE 3000
+
+USER node
+
+CMD ["npm", "run", "start"]