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# Dockerfile for Next.js standalone output FROM node:20-alpine AS base # Install dependencies only when needed FROM base AS deps RUN apk add --no-cache libc6-compat WORKDIR /app COPY package.json package-lock.json ./ RUN npm ci # Build the application FROM base AS builder WORKDIR /app COPY --from=deps /app/node_modules ./node_modules COPY . . ENV NEXT_TELEMETRY_DISABLED=1 RUN npm run build # Production image — minimal FROM base AS runner WORKDIR /app ENV NODE_ENV=production ENV NEXT_TELEMETRY_DISABLED=1 RUN addgroup --system --gid 1001 nodejs RUN adduser --system --uid 1001 nextjs # Copy standalone output COPY --from=builder /app/.next/standalone ./ # Copy static assets (NOT included in standalone) COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static # Copy public directory COPY --from=builder /app/public ./public USER nextjs EXPOSE 3000 ENV PORT=3000 ENV HOSTNAME="0.0.0.0" CMD ["node", "server.js"]
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