Dockerfile

# From https://github.com/vercel/next.js/blob/18d112fb5ca62bdb7b1361a65c7e33615d16bdd1/examples/with-docker/Dockerfile

FROM node:20-alpine AS base
# Use /app/.yarn/cache instead of global cache
ENV YARN_ENABLE_GLOBAL_CACHE=false

# 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

COPY package.json yarn.lock .yarnrc.yml ./
COPY .yarn ./.yarn
RUN yarn workspaces focus --production

FROM base AS builder
# 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

COPY package.json yarn.lock .yarnrc.yml ./
COPY .yarn ./.yarn
RUN yarn install --immutable

COPY . .

ENV NEXT_TELEMETRY_DISABLED 1

RUN yarn build

# Production image, copy all the files and run next
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 --chown=nextjs:nodejs package.json yarn.lock .yarnrc.yml ./
COPY --from=deps --chown=nextjs:nodejs /app/.pnp.* ./
COPY --from=deps --chown=nextjs:nodejs /app/.yarn ./.yarn

COPY --chown=nextjs:nodejs next.config.js .env* ./
COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next

USER nextjs

EXPOSE 3000

ENV PORT 3000

CMD ["yarn", "start"]