# Multi-stage: frontend-bygge -> backend-deps -> slim runtime (arm64 på Pi5)
ARG BUILD_CPUS=2

FROM node:22-slim AS frontend
WORKDIR /f
COPY frontend/package.json frontend/package-lock.json ./
RUN npm ci --no-audit --no-fund
COPY frontend/ ./
RUN npm run build

FROM node:22-slim AS backend
WORKDIR /app
COPY backend/package.json backend/package-lock.json ./
RUN npm ci --omit=dev --no-audit --no-fund
COPY backend/src ./src

FROM node:22-slim
ENV NODE_ENV=production
WORKDIR /app
COPY --from=backend /app ./
COPY --from=frontend /f/dist ./public
EXPOSE 3000
USER node
CMD ["node", "src/server.js"]