Remove API.md and jsdom/dompurify/marked dependencies

[Copilot]

API.md was superseded by public/API.html but never removed. The /api route that rendered it pulled in jsdom, dompurify, and marked — packages that cause ESM/Jest compatibility issues and serve no other purpose.

Changes

• API.md — deleted
• index.js — removed GET /api route, makeCleanFileFromMarkdown(), and all associated imports (jsdom, dompurify, marked, fs)
• package.json — removed jsdom, dompurify, and marked from dependencies
• __tests__/mount.test.js — removed existence assertions for GET /api route and API.md file

Original prompt

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This section details on the original issue you should resolve

<issue_title>API.md and jsdom</issue_title>
<issue_description>API.md is no longer in use and can be removed, it should have been removed when API.html was introduced.

The jsdom package has ESM troubles and does not work with Jest. It is only used to serve API.md.

Remove API.md and the jsdom package so we can avoid all the trouble now and in the future. </issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes API.md and jsdom #473

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[Copilot]

Pull request overview

This PR removes the dynamic /api documentation endpoint that generated HTML from API.md, shifting API docs to the static public/API.html page and cleaning up now-unused dependencies and tests accordingly.

Changes:

• Removed the Express GET /api route and the Markdown-to-sanitized-HTML rendering pipeline from index.js.
• Deleted API.md and updated tests/documentation artifacts to rely on public/API.html instead.
• Removed dompurify, jsdom, and marked from dependencies and pruned them from package-lock.json.

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
public/API.html	Removes footer text implying the page is generated from API.md.
package.json	Drops dependencies used only for the removed /api Markdown rendering.
package-lock.json	Removes lockfile entries corresponding to dropped dependencies.
index.js	Removes /api docs route and Markdown sanitization/rendering code, leaving only root routing.
API.md	Deletes the Markdown documentation source file.
tests/mount.test.js	Updates existence tests to stop expecting /api route and API.md file.

Comments suppressed due to low confidence (1)

index.js:23

• The GET /api route has been removed. If any external links or tooling rely on /api for API documentation, this is a breaking change; consider keeping a lightweight /api handler that redirects (301/302) to the static /API.html (or serves it) to preserve backwards compatibility.

router
  .route("/")
  .get(function (_req, res, next) {
    respondWithHTML(res)
  })

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