# syntax=docker/dockerfile:1.7

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

WORKDIR /app

# Зависимости (кэшируется)
COPY package.json package-lock.json ./
RUN npm install --no-audit --no-fund --legacy-peer-deps

# Исходники
COPY public ./public
COPY src    ./src

ENV GENERATE_SOURCEMAP=false \
    DISABLE_ESLINT_PLUGIN=true \
    NODE_OPTIONS=--max_old_space_size=4096

RUN npm run build


# ─── Stage 2: runtime — лёгкий статический сервер ────────────────
FROM node:20-alpine AS runtime

WORKDIR /app

# `serve` — минималистичный SPA-сервер (~2 МБ), флаг -s = SPA fallback на index.html
RUN npm install -g serve@14.2.4 && \
    addgroup -S app && adduser -S app -G app

# Только готовый билд
COPY --from=builder --chown=app:app /app/build ./build

USER app

ENV NODE_ENV=production \
    PORT=24452

EXPOSE 24452

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
    CMD wget -qO- http://localhost:24452/ > /dev/null 2>&1 || exit 1

CMD ["serve", "-s", "build", "-l", "24452", "--no-clipboard"]