Dockerfile

# Install dependencies only when needed
FROM node:lts-alpine AS deps

WORKDIR /app

RUN apk add --no-cache libc6-compat

COPY package.json yarn.lock ./

RUN yarn install --frozen-lockfile

FROM node:lts-alpine AS builder

WORKDIR /app

COPY --from=deps /app/node_modules ./node_modules
COPY . .

RUN yarn build

FROM node:lts-alpine AS runner

WORKDIR /app

ENV NODE_ENV=production

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

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

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"]