Changes made for this site (original: https://github.com/pcottle/learnGitBranching @ a0fac58a4a98d2b6ca5cccb8fe1da76c48249a8e)

Build: the files here are the Vite production build of the patched source (npm install --ignore-scripts,
node scripts/generate.js, npx vite build; the repo's own unit tests and postbuild copy step were not run).
Only build/index.html and build/assets/ are served; the raw assets/ folder (including the upsell images
biteRead.png and waitingFor.png and the social-preview image) and generatedDocs/ were not copied.

Source changes before building:
- index.html: removed the Google Analytics (gtag.js) tag, the rotating promotional banner for the
  author's other projects (markup, script and images), the "View source on GitHub" corner ribbon and
  the Open Graph / experimental meta tags.
- src/js/log/index.js: the analytics event logger is now a no-op.
- src/js/app/index.js:
  - loading a level from a GitHub gist (?gist_level_id=..., a request to api.github.com) is disabled;
  - the hreflang <link> tags pointing at the original website are no longer added;
  - lesson text links: links to other websites are shown as plain text; links to the original app
    (such as the "?NODEMO" sandbox link in the welcome dialog) open this copy instead.
- src/js/util/sharing.js: the "share your progress" buttons (Twitter/X, LinkedIn, Facebook) are not shown.
- src/js/sandbox/index.js: "share permalink" builds the link from this page's own address instead of
  the original website.
- src/js/sandbox/commands.js and src/js/git/commands.js: the "Docs" links to git-scm.com in the
  command lists were removed (the command names and descriptions are kept).
- src/js/react_views/MainHelperBarView.jsx: removed the link to the author's social-media profile.
Levels, the git simulation, translations and the completion certificate are unchanged (the certificate
image still names the original site, learngitbranching.js.org, as its source).

Third-party code and fonts bundled by the build: see THIRD-PARTY-LICENSES.txt (license texts of the npm
packages and the Font Awesome notices), FONT-AWESOME-LICENSE.txt (Font Awesome Free 6.6.0: icons CC BY 4.0,
fonts SIL OFL 1.1, code MIT), CC-BY-4.0.txt and CC-BY-3.0.txt (the older Font Awesome webfont, CC BY 3.0).