aplicada la misma idea a todos los servicios

whatsapp-router/Dockerfile

@@ -1,8 +1,20 @@
-FROM node:18-alpine
+# ---------- Etapa de build ----------
+FROM node:18-alpine AS builder
 WORKDIR /app
-COPY package.json package-lock.json* ./
-RUN npm install --production
+
+COPY package*.json ./
+RUN npm install
+
 COPY . .
 RUN npm run build
+
+# ---------- Etapa ligera para producción ----------
+FROM node:18-alpine
+WORKDIR /app
+
+COPY --from=builder /app/dist ./dist
+COPY package*.json ./
+RUN npm install --production
+
 EXPOSE 3001
-CMD ["node","dist/index.js"]
+CMD ["node", "dist/index.js"]