Stage the Flutter site

Before committing changes or reviewing a PR locally, it is important to stage the site and ensure everything works correctly. Follow these steps to stage the site:

1. Check for broken links

Run the following command to check for any unlinked or broken Markdown link references in the site output:

dart run dash_site check-link-references

Alternatively, to verify all links between pages on the site work:

dart run dash_site check-links