# ── Stage 1: Build React frontend ─────────────────────────────────────────
FROM node:20-alpine AS builder

WORKDIR /app
COPY frontend/package*.json ./
RUN npm ci
COPY frontend/ .
RUN npm run build

# ── Stage 2: Serve with nginx ──────────────────────────────────────────────
FROM nginx:alpine

COPY --from=builder /app/dist /usr/share/nginx/html
COPY nginx.conf /etc/nginx/conf.d/default.conf

EXPOSE 80

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD wget -q --spider http://localhost/ || exit 1