The root package.json prepare script runs node scripts/install-hooks.mjs
at install time. gateway.Dockerfile and web.Dockerfile COPY scripts/
before pnpm install --frozen-lockfile; appservice.Dockerfile was the one
missed by 91e692e3, so build-appservice fails MODULE_NOT_FOUND on next
pushes (first terminal trunk run: pipeline 2883). Same one-line COPY,
same comment, matching gateway line 14.