# This file is inspired by https://github.com/vercel/next.js/blob/canary/examples/with-docker/Dockerfile

FROM node:18-alpine AS base

#-----------------------------------------
# STAGE 1: Build the Next.js project
#-----------------------------------------
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

# package.json and package-lock.json
COPY ./package.json ./package-lock.json ./

# installing dependencies
RUN npm i && npm cache clean --force

# copy all the soruce code
COPY . .

# building app
RUN npm run build

#-----------------------------------------
# STAGE 3: Run the Next.js server
#-----------------------------------------
FROM base as production

WORKDIR /app

ENV NODE_ENV production

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

# this file is required for the pdfjs-dist package
COPY --from=builder /app/node_modules/pdfjs-dist/build/pdf.worker.min.mjs /public/pdf.worker.min.mjs

# Set the correct permission for prerender cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
# https://nextjs.org/docs/advanced-features/output-file-tracing
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

# server.js is created by next build from the standalone output
# https://nextjs.org/docs/pages/api-reference/next-config-js/output
CMD ["node", "server.js"]
