FROM node:22-alpine AS builder

WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .

# NEXT_PUBLIC_* variables are inlined into JS bundles at build time.
# Pass the real API URL as a build argument — it cannot be changed at runtime.
ARG NEXT_PUBLIC_API_URL=/api/v1
ENV NEXT_PUBLIC_API_URL=$NEXT_PUBLIC_API_URL

RUN npm run build

# ─────────────────────────────────────────────────────────────────────────────

FROM node:22-alpine AS runner

WORKDIR /app
ENV NODE_ENV=production
ENV PORT=3000
ENV HOSTNAME=0.0.0.0

# next.config.ts has output: 'standalone' — copy only what the standalone server needs
RUN mkdir -p ./public
COPY --from=builder /app/.next/standalone        ./
COPY --from=builder /app/.next/static            ./.next/static

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