ARG RUNNER_ENV=production

FROM node:20-alpine AS base

#################################################
# DEPENDENCY INSTALLER
#################################################
FROM base 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

# Install dependencies based on the preferred package manager
COPY package.json yarn.lock* package-lock.json* pnpm-lock.yaml* ./
RUN npm install


#################################################
# PRODUCTION BUILDER
#################################################
FROM base AS builder-production

ENV NODE_ENV=production

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

RUN SKIP_ENV_VALIDATION=1 npm run build

#################################################
# PRODUCTION RUNNER
#################################################
FROM base AS runner-production
WORKDIR /app

ENV NODE_ENV production

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

COPY --from=builder-production /app/public ./public

# 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-production --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder-production --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs

EXPOSE 3000

ENV PORT 3000
# set hostname to localhost
ENV HOSTNAME "0.0.0.0"

# 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"]

#############################################
# Branch based on RUNNER_ENV for deployment #
#############################################
FROM runner-${RUNNER_ENV} AS runner