# ── Build stage ──
FROM node:20-alpine AS builder

WORKDIR /app

# Install dependencies (leveraging Docker layer cache)
COPY package.json package-lock.json ./
RUN npm ci

# Copy source and build
COPY . .
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# ── Runtime stage ──
FROM node:20-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

# Create non-root user
RUN addgroup --system --gid 1001 nodejs && \
    adduser --system --uid 1001 nextjs

# Copy standalone output from builder
COPY --from=builder /app/.next/standalone ./
COPY --from=builder /app/.next/static ./.next/static
COPY --from=builder /app/public ./public

# Set correct ownership
RUN chown -R nextjs:nodejs /app

USER nextjs

EXPOSE 3000

ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

CMD ["node", "server.js"]