Dockerfile

# Install dependencies only when needed
FROM node:18-alpine 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 ./
RUN corepack enable
RUN yarn install

# Rebuild the source code only when needed
FROM node:18-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN yarn build


# Production image, copy all the files and run next
FROM node:18-alpine AS runner
WORKDIR /app

ENV NODE_ENV production

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

COPY --from=builder /app/public ./public
COPY --from=builder --chown=nextjs:nodejs /app/.next ./.next
COPY --from=deps /app/node_modules ./node_modules
COPY package.json next.config.js  ./

USER nextjs
EXPOSE 3000
ENV PORT 3000

CMD ["yarn", "start"]