#7342: fix(docker): ensure readability of docker-setup.sh

ensuring readability of docker-setup.sh <!-- greptile_comment --> <h2>Greptile Overview</h2> <h3>Greptile Summary</h3> This PR makes a small readability tweak to `docker-setup.sh` (adds a blank line before `upsert_env()`), which is used to build the local Docker image, generate/update a `.env`, optionally write an extra compose file for mounts/volumes, run interactive onboarding via `openclaw-cli`, and then start the gateway container. <h3>Confidence Score: 4/5</h3> - This PR is safe to merge with minimal risk. - The diff is effectively formatting-only, but the review surfaced a pre-existing robustness issue in `docker-setup.sh` that can cause token generation to fail on systems without `openssl` and `python3` under `set -e`. - docker-setup.sh <!-- greptile_other_comments_section --> _{(5/5) You can turn off certain types of comments like style [here](https://app.greptile.com/review/github)!} <!-- /greptile_comment -->