fix: copy postinstall for cleanup docker

scripts/docker/cleanup-smoke/Dockerfile

@@ -10,6 +10,7 @@ RUN apt-get update \
 WORKDIR /repo
 COPY package.json pnpm-lock.yaml pnpm-workspace.yaml ./
 COPY patches ./patches
+COPY scripts/postinstall.js ./scripts/postinstall.js
 RUN corepack enable \
   && pnpm install --frozen-lockfile