Dockerfile

# syntax=docker/dockerfile:1
# ─── Stage 1: install dependencies ───────────────────────────────────────────
FROM node:20-alpine AS deps
WORKDIR /app

COPY package.json package-lock.json ./
RUN npm ci

# ─── Stage 2: build ───────────────────────────────────────────────────────────
FROM node:20-alpine AS builder
WORKDIR /app

ENV NEXT_TELEMETRY_DISABLED=1

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

RUN npm run build

# ─── Stage 3: runtime ─────────────────────────────────────────────────────────
FROM node:20-alpine AS runner
WORKDIR /app

ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

RUN addgroup --system --gid 1001 nodejs \
 && 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"]