The new [Shopware template](https://developer.shopware.com/docs/guides/installation/template) does not have a `bin/build.sh` file anymore. The missing executable executed `composer install` and `bin/build-js.sh`. Since requiring the new Symfony flex recipe requires running `composer` manually, we just execute `bin/build-js.sh` now.
This could be a breaking change for some users. Don't know if you want to state that somewhere or allow a way to restore the old behavior via flag (although one can just override the `sw-build-without-db:build` task anytime).