FROM node:20-alpine AS base

# ── Dependencies ────────────────────────────────────────────────────────────
FROM base AS deps
WORKDIR /app
COPY package*.json ./
RUN npm ci

# ── Builder ─────────────────────────────────────────────────────────────────
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# ── Runner ──────────────────────────────────────────────────────────────────
FROM base AS runner
WORKDIR /app

ENV NODE_ENV=production

RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

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

USER nextjs

EXPOSE 3000

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