54 lines
1.6 KiB
Docker
54 lines
1.6 KiB
Docker
# syntax=docker/dockerfile:1
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# Stage 1: Install dependencies
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FROM node:22-alpine 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.json package-lock.json ./
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# devDeps are required to build (typescript, tailwind, eslint-config-next).
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# This whole stage is discarded — none of it reaches the runner.
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RUN npm ci --no-audit --no-fund
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# Stage 2: Build the Next.js application
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FROM node:22-alpine 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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ENV NEXT_TELEMETRY_DISABLED=1
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ENV NODE_ENV=production
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# Each Docker build starts from a clean layer, so Turbopack's .next/cache is
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# written but never restored. Skipping it cuts ~20% of build CPU (the metric
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# that matters on a 1-vCPU host) and 116 MB off this layer.
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ENV CI_BUILD=1
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RUN npm run build
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# Stage 3: Production runner with Next.js Standalone
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FROM node:22-alpine AS runner
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RUN apk add --no-cache libc6-compat
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WORKDIR /app
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ENV NODE_ENV=production
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ENV NEXT_TELEMETRY_DISABLED=1
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ENV PORT=3000
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ENV HOSTNAME="0.0.0.0"
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# Run as a non-root user; nextjs owns nothing it does not need to write.
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RUN addgroup -g 1001 -S nodejs && adduser -u 1001 -S nextjs -G nodejs
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# Copy public static assets and standalone build output.
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# These three paths are the ENTIRE runtime payload (~57 MB). Never copy the
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# whole .next/ directory here — .next/dev and .next/cache are build-host-only
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# and account for ~1.96 GB.
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COPY --from=builder --chown=nextjs:nodejs /app/public ./public
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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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CMD ["node", "server.js"]
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