Contributes to #851.

What changed

• Adds a server-side rendering usage section for @cycle/html.
• Shows makeHTMLDriver() receiving rendered markup and sending an HTML response.
• Clarifies that the HTML driver exposes a DOMSource-compatible source with empty event streams on the server.
• Keeps docs/api/html.html in sync with docs/content/api/html.md.

Verification

• node --check .scripts/make-api-docs.js
• git diff --check

Note

I attempted to regenerate the HTML API page with node .scripts/make-api-docs.js html, but the existing docs toolchain fails before writing output because the installed dox dependency throws TypeError: parse is not a function. I therefore mirrored the Markdown addition into the rendered HTML without changing the existing generated API block.