[#62963228]

* chapter-toc-62963228:
  Polish
  Issue pull request for branch chapter-toc-62963228
  Properly link chapter-star elements in frontmatter
  Link chapter-star elements properly
  Fix an EPUB validation error
  Get custom.css working with local server
  Add support for custom.css
Merge branch 'master' into working-with-rt-62992896