Dockerfile.md

FROM node:22-alpine AS base

Install dependencies only when needed

FROM base AS deps

Check https://github.com/nodejs/docker-node/tree/b4117f9333da4138b03a546ec926ef50a31506c3#nodealpine to understand why libc6-compat might be needed.

RUN apk add --no-cache libc6-compat WORKDIR /app

Install dependencies based on the preferred package manager

COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./ RUN
if [ -f yarn.lock ]; then yarn --frozen-lockfile;
elif [ -f package-lock.json ]; then npm ci;
elif [ -f pnpm-lock.yaml ]; then yarn global add pnpm && pnpm i --frozen-lockfile;
else echo "Lockfile not found." && exit 1;
fi

Rebuild the source code only when needed

FROM base AS builder WORKDIR /app COPY --from=deps /app/node_modules ./node_modules COPY . .

Next.js collects completely anonymous telemetry data about general usage.

Learn more here: https://nextjs.org/telemetry

Uncomment the following line in case you want to disable telemetry during the build.

ENV NEXT_TELEMETRY_DISABLED 1 ENV SKIP_ENV_VALIDATION 1

RUN yarn build

If using npm comment out above and use below instead

RUN npm run build

Production image, copy all the files and run next

FROM base AS runner WORKDIR /app

ENV NODE_ENV production

Uncomment the following line in case you want to disable telemetry during runtime.

ENV NEXT_TELEMETRY_DISABLED 1

RUN addgroup --system --gid 1001 nodejs RUN adduser --system --uid 1001 nextjs

COPY --from=builder /app/public ./public

Automatically leverage output traces to reduce image size

https://nextjs.org/docs/advanced-features/output-file-tracing

COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./ COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT 3000

CMD ["node", "server.js"]