Dockerfile

# Install dependencies only when needed
FROM node:14.19-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
RUN apk add --no-cache curl \
  && curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm

WORKDIR /app
# Files required by pnpm install
COPY package.json pnpm-lock.yaml ./
RUN pnpm install --frozen-lockfile

# Rebuild the source code only when needed
FROM node:14.19-alpine AS builder

RUN apk add --no-cache curl \
  && curl -f https://get.pnpm.io/v6.16.js | node - add --global pnpm

WORKDIR /app
COPY . .
COPY --from=deps /app/node_modules ./node_modules
RUN pnpm build

# Production image, copy the files
FROM node:14.19-alpine AS runner

WORKDIR /app
ENV NODE_ENV production

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

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 3000

ENV PORT 3000

# Runing the app
CMD ["node_modules/.bin/next", "start"]