Dockerfile

FROM node:alpine AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app
COPY package.json yarn.lock ./
RUN yarn install --frozen-lockfile

FROM node:alpine AS builder
WORKDIR /app
COPY . .
COPY --from=deps /app/node_modules ./node_modules
RUN yarn build

FROM node:alpine AS runner
WORKDIR /app

ARG APP_ENV=production
ARG NODE_ENV=production
ARG PORT=3000

ENV APP_ENV=${APP_ENV} \
    NODE_ENV=${NODE_ENV} \
    PORT=${PORT}

RUN addgroup -g 1001 -S nodejs
RUN adduser -S nextjs -u 1001

RUN mkdir -p /app/.next/cache/images && chown nextjs:nodejs /app/.next/cache/images
VOLUME /app/.next/cache/images

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

USER nextjs

EXPOSE ${PORT}

CMD ["yarn", "start"]