# --- STAGE 1: BUILDER ---
FROM node:20-alpine AS builder
WORKDIR /app

# Install dependencies
COPY package*.json ./
RUN npm install

# Copy source code
COPY . .

# Build Next.js app
RUN npm run build

# --- STAGE 2: RUNNER ---
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production

# Don't run as root
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy standalone build
COPY --from=builder /app/public ./public

# Set permissions for standalone build
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

# Start standalone server
CMD ["node", "server.js"]