# ---------- Etapa de build ----------
FROM node:18-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm install          # incluye TypeScript
COPY . .
RUN npm run build        # genera /app/dist

# ---------- Etapa ligera de runtime ----------
FROM node:18-alpine
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY package*.json ./
RUN npm install --production   # solo deps de runtime
EXPOSE 3000
CMD ["node", "dist/server.js"]