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Dockerfile

Imagen Node.js multietapa — capa final pequeña, solo dependencias de producción.

# --- build ---
FROM node:22-alpine AS build
WORKDIR /app
COPY package*.json ./
RUN npm ci
COPY . .
RUN npm run build

# --- run ---
FROM node:22-alpine
WORKDIR /app
ENV NODE_ENV=production
COPY package*.json ./
RUN npm ci --omit=dev
COPY --from=build /app/dist ./dist
EXPOSE 3000
CMD ["node", "dist/index.js"]