Summary

When --web-base-path is configured, the embedded web UI renders a blank page
because the built frontend bundle is referenced with a root-relative / assets/... URL instead of a base-path-aware URL.

Steps to reproduce

1. Enable --web-base-path=pgwatch in docker/compose.pgwatch.yml
2. Start pgwatch using the documented Docker flow
3. Open http://localhost:8080/pgwatch/

Actual behavior

The page is blank.

Browser devtools show the main JS bundle requested from /assets/index-*.js,
which returns 404 Not Found, so the module never loads.

Expected behavior

The frontend bundle should be requested from /pgwatch/assets/index-*.js and
the UI should load normally.

Notes

The backend routes and frontend API calls already honor web-base-path; the
problem is that the generated frontend asset URLs are root-relative.

Desktop (please complete the following information):

• OS: Ubuntu
• Browser firefox
• Version latest