# ── Stage 1 : deps ───────────────────────────────────────────────────────────
FROM node:20-alpine AS deps

WORKDIR /app
COPY package.json package-lock.json* ./
RUN npm install --omit=dev

# ── Stage 2 : runtime ─────────────────────────────────────────────────────────
FROM node:20-alpine

WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

ENV NODE_ENV=production
ENV PORT=3000

EXPOSE 3000
CMD ["node", "src/index.js"]