FROM node:20-alpine AS base
WORKDIR /app

# ── Installazione dipendenze ─────────────────────────────────────────────────
FROM base AS deps
COPY package.json package-lock.json* ./
RUN npm ci --prefer-offline

# ── Build di produzione ─────────────────────────────────────────────────────
FROM base AS builder
COPY --from=deps /app/node_modules ./node_modules
COPY . .
RUN npm run build

# ── Runtime (nginx serve) ───────────────────────────────────────────────────
FROM nginx:alpine AS runner
COPY --from=builder /app/dist /usr/share/nginx/html
COPY nginx.conf /etc/nginx/conf.d/default.conf
EXPOSE 3000
CMD ["nginx", "-g", "daemon off;"]

# ── Sviluppo (hot reload) ───────────────────────────────────────────────────
FROM base AS dev
COPY --from=deps /app/node_modules ./node_modules
COPY . .
EXPOSE 3000
CMD ["npm", "run", "dev"]