# ── Stage 1: React bauen ─────────────────────────────────────────────────────
FROM node:20-alpine AS builder
WORKDIR /build
COPY frontend/package.json ./
RUN npm install
COPY frontend/ ./
RUN npm run build

# ── Stage 2: Express liefert API + React in einem Container ──────────────────
FROM node:20-alpine
WORKDIR /app
COPY backend/package.json ./
RUN npm install --production
COPY backend/ ./
COPY version.txt ./version.txt
COPY --from=builder /build/dist ./public
EXPOSE 4000
CMD ["node", "src/index.js"]