# DAARION Web Frontend - SECURE Dockerfile
# Multi-stage build with security hardening
# Version: 2.0.0 (Post-Incident Hardening)
# Created: 2026-01-09

# ============================================
# Stage 1: Dependencies (isolated build)
# ============================================
FROM node:20-alpine AS deps

# Security: Remove unnecessary packages
RUN apk add --no-cache libc6-compat \
    && rm -rf /var/cache/apk/*

WORKDIR /app

# Copy only package files for caching
COPY package.json package-lock.json* ./

# Clean install with audit
RUN npm ci --only=production --ignore-scripts \
    && npm cache clean --force

# ============================================
# Stage 2: Builder (compile application)
# ============================================
FROM node:20-alpine AS builder

WORKDIR /app

# Copy dependencies from previous stage
COPY --from=deps /app/node_modules ./node_modules

# Copy source code
COPY . .

# Build-time environment
ENV NEXT_TELEMETRY_DISABLED=1
ENV NODE_ENV=production

# Build the application
RUN npm run build

# Remove dev dependencies and clean
RUN npm prune --production \
    && rm -rf .git .github .next/cache

# ============================================
# Stage 3: Runner (minimal production image)
# ============================================
FROM node:20-alpine AS runner

LABEL maintainer="DAARION Security Team"
LABEL version="2.0.0-secure"
LABEL description="Hardened DAARION Web Frontend"

WORKDIR /app

# Environment
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Create non-root user with specific UID/GID
RUN addgroup --system --gid 1001 nodejs \
    && adduser --system --uid 1001 --ingroup nodejs nextjs

# Security: Remove unnecessary tools
RUN apk del --purge wget curl \
    && rm -rf /var/cache/apk/* /tmp/* /var/tmp/* \
    && rm -f /bin/sh /bin/ash 2>/dev/null || true

# Copy only necessary production files
COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Security: Set restrictive permissions
RUN chmod -R 500 /app \
    && chmod -R 400 /app/public \
    && chmod 500 /app/server.js

# Switch to non-root user
USER nextjs

# Expose port (internal only)
EXPOSE 3000

# Health check
HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
    CMD node -e "require('http').get('http://localhost:3000/api/health', (r) => process.exit(r.statusCode === 200 ? 0 : 1))" || exit 1

# Run application
CMD ["node", "server.js"]