FROM node:20-alpine AS deps
WORKDIR /app
RUN apk add --no-cache libc6-compat
COPY package*.json ./
RUN npm ci

FROM node:20-alpine AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Build-time env vars (must be present during `next build` for NEXT_PUBLIC_*)
ARG NEXT_PUBLIC_CORE_API_URL
ENV NEXT_PUBLIC_CORE_API_URL=${NEXT_PUBLIC_CORE_API_URL}

ENV NEXT_TELEMETRY_DISABLED=1
ENV NODE_ENV=production
RUN npm run build

FROM node:20-alpine AS runner
WORKDIR /app
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1
ENV PORT=3000
ENV HOSTNAME="0.0.0.0"

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

COPY --from=builder /app/public ./public
RUN mkdir .next && chown nextjs:nodejs .next
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

USER nextjs
EXPOSE 3000
CMD ["node", "server.js"]