Force drift rebuild: add CACHE_BUST build arg to Dockerfile + docker-compose

products/02-iac-drift-detection/saas/Dockerfile

@@ -1,5 +1,6 @@
 FROM node:22-slim AS builder
 WORKDIR /app
+ARG CACHE_BUST=1
 COPY package.json package-lock.json* ./
 RUN npm ci --include=dev
 COPY . .

products/docker-compose.yml

@@ -57,6 +57,8 @@ services:
     build:
       context: ./01-llm-cost-router
       dockerfile: Dockerfile
+      args:
+        CACHE_BUST: "2026-03-01-2300"
     command: ["dd0c-api"]
     ports:
       - "3001:3000"
@@ -108,6 +110,8 @@ services:
     build:
       context: ./02-iac-drift-detection/saas
       dockerfile: Dockerfile
+      args:
+        CACHE_BUST: "2026-03-01-2300"
     ports:
       - "3002:3000"
     environment: