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# Multi-stage build for Next.js
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FROM node:18-alpine AS base
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# Install dependencies only when needed
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FROM base AS deps
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RUN apk add --no-cache libc6-compat
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WORKDIR /app
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# Copy package files
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COPY package*.json ./
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RUN npm ci
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# Rebuild the source code only when needed
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FROM base AS builder
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WORKDIR /app
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COPY --from=deps /app/node_modules ./node_modules
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COPY . .
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# Build the application
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RUN npm run build
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# Production image, copy all the files and run next
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FROM base AS runner
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WORKDIR /app
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ENV NODE_ENV=production
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# Install curl for health checks
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RUN apk add --no-cache curl
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RUN addgroup --system --gid 1001 nodejs
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RUN adduser --system --uid 1001 nextjs
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COPY --from=builder /app/public ./public
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# Set the correct permission for prerender cache
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RUN mkdir .next
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RUN chown nextjs:nodejs .next
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# Automatically leverage output traces to reduce image size
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COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
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COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
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USER nextjs
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EXPOSE 3000
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ENV PORT=3000
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ENV HOSTNAME="0.0.0.0"
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# Health check
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HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
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CMD curl -f http://localhost:3000 || exit 1
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CMD ["node", "server.js"] |