FROM node:18-alpine AS base

# Install dependencies only when needed
FROM base AS deps
WORKDIR /app
COPY package.json package-lock.json ./
RUN npm ci

# Rebuild the source code only when needed
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Pass API URL during build time (Next.js inlines this)
ARG NEXT_PUBLIC_API_URL=0.0.0.0:8765
ENV NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}

RUN npm run build

# Production image, copy all the files and run next
FROM base AS runner
WORKDIR /app
ENV NODE_ENV production
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

COPY --from=builder /app/public ./public
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
CMD ["node", "server.js"]