# ── Stage 1: React bauen ─────────────────────────────────────────────────────
FROM node:20-alpine AS builder
WORKDIR /build
COPY frontend/package.json ./
RUN npm install
COPY frontend/ ./
# version.txt VOR dem Build generieren – Unix-Timestamp (Sekunden)
# Dieser Wert wird von vite.config.js als __BUILD_TIME__ ins Bundle gebacken
# UND vom Backend als /api/build-time ausgeliefert → exakt derselbe Wert
RUN date -u +"%s" > ./version.txt
RUN npm run build

# ── Stage 2: Express liefert API + React in einem Container ──────────────────
FROM node:20-alpine
RUN apk add --no-cache tzdata python3 make g++ \
    chromium nss freetype harfbuzz ca-certificates ttf-freefont
ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=true \
    CHROMIUM_PATH=/usr/bin/chromium-browser
WORKDIR /app
COPY backend/package.json ./
RUN npm install --production
COPY backend/ ./
# version.txt aus dem Build-Stage kopieren (selber Wert wie im JS-Bundle)
COPY --from=builder /build/version.txt ./version.txt
COPY --from=builder /build/dist ./public
EXPOSE 4000
CMD ["node", "src/index.js"]